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柳州建筑爵士白大理石廠

2021-03-21
柳州建筑爵士白大理石廠

不(bu)只可(ke)以降(jiang)低(di)石(shi)材(cai)裝修本(ben)(ben)錢,重(zhong)慶(qing)石(shi)材(cai)加工(gong)廠而且(qie)可(ke)以節約和(he)有(you)用運用有(you)限的(de)貴(gui)重(zhong)石(shi)材(cai)本(ben)(ben)錢。除可(ke)直接粘(zhan)貼(tie)外,還可(ke)以制成蜂(feng)窩板(ban)(ban)(ban)、復(fu)合板(ban)(ban)(ban)等;而且(qie)經國(guo)外建筑(zhu)物運用超薄(bo)板(ban)(ban)(ban)證(zheng)明,超薄(bo)型天然石(shi)材(cai)能(neng)較好的(de)飽嘗地震(zhen)、熱脹冷縮等各類(lei)惡劣(lie)環(huan)境的(de)檢查。啥樣的(de)石(shi)板(ban)(ban)(ban)瓦(wa)(wa)(wa)才(cai)是好的(de)石(shi)板(ban)(ban)(ban)瓦(wa)(wa)(wa)重(zhong)慶(qing)石(shi)材(cai)加工(gong)廠告訴你啥樣的(de)石(shi)板(ban)(ban)(ban)瓦(wa)(wa)(wa)才(cai)是好的(de)石(shi)板(ban)(ban)(ban)瓦(wa)(wa)(wa)高硅,低(di)鈣、鐵、鎂、鋁、黑度(du)深、色差(cha)小、可(ke)劈(pi)分(fen)性高、表面(mian)平整度(du)好,二氧化硅的(de)凹凸(tu)會觸及(ji)板(ban)(ban)(ban)質(zhi)的(de)硬度(du)和(he)吸水(shui)率(lv),我國(guo)(R1)、德國(guo)、美國(guo)(S1)的(de)板(ban)(ban)(ban)石(shi)規(gui)范來說,低(di)硅的(de)板(ban)(ban)(ban)材(cai)因其抗壓強度(du)和(he)吸水(shui)率(lv)的(de)缺少不(bu)能(neng)用來做屋面(mian)瓦(wa)(wa)(wa)板(ban)(ban)(ban),高鈣的(de)板(ban)(ban)(ban)材(cai)易(yi)褪色、風化,高金(jin)屬(shu)元素的(de)易(yi)于空氣中的(de)硫元素反應致使老化開(kai)裂,具體請(qing)參看國(guo)度(du)板(ban)(ban)(ban)石(shi)查驗規(gui)范GB 18600,我國(guo)國(guo)度(du)天然板(ban)(ban)(ban)石(shi)僅有(you)的(de)查驗規(gui)范。

柳州建筑爵士白大理石廠

近年來中國作為石(shi)(shi)(shi)材(cai)(cai)(cai)(cai)(cai)(cai)(cai)開采和(he)(he)加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)的(de)(de)(de)領(ling)頭國,生產240個(ge)(ge)品種(zhong)的(de)(de)(de)花崗(gang)石(shi)(shi)(shi),石(shi)(shi)(shi)材(cai)(cai)(cai)(cai)(cai)(cai)(cai)總產量約占(zhan)(zhan)世界的(de)(de)(de)65%。在石(shi)(shi)(shi)材(cai)(cai)(cai)(cai)(cai)(cai)(cai)加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)中,石(shi)(shi)(shi)材(cai)(cai)(cai)(cai)(cai)(cai)(cai)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)具占(zhan)(zhan)有(you)(you)重(zhong)要(yao)地位。石(shi)(shi)(shi)材(cai)(cai)(cai)(cai)(cai)(cai)(cai)加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)主要(yao)包括石(shi)(shi)(shi)材(cai)(cai)(cai)(cai)(cai)(cai)(cai)鋸(ju)(ju)(ju)割(ge)(ge)、石(shi)(shi)(shi)材(cai)(cai)(cai)(cai)(cai)(cai)(cai)磨(mo)削(xue)和(he)(he)石(shi)(shi)(shi)材(cai)(cai)(cai)(cai)(cai)(cai)(cai)拋光。石(shi)(shi)(shi)材(cai)(cai)(cai)(cai)(cai)(cai)(cai)加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)具主要(yao)采用(yong)(yong)金(jin)(jin)剛(gang)石(shi)(shi)(shi)磨(mo)料(liao)和(he)(he)陶瓷磨(mo)料(liao)。在加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)中,鋸(ju)(ju)(ju)切(qie)(qie)(qie)加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)是機械加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)的(de)(de)(de)一道工(gong)(gong)(gong)(gong)(gong)(gong)(gong)序(xu),鋸(ju)(ju)(ju)切(qie)(qie)(qie)加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)成(cheng)本(ben)占(zhan)(zhan)整個(ge)(ge)加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)成(cheng)本(ben)的(de)(de)(de)50%以(yi)上。目(mu)前,石(shi)(shi)(shi)材(cai)(cai)(cai)(cai)(cai)(cai)(cai)等硬(ying)脆材(cai)(cai)(cai)(cai)(cai)(cai)(cai)料(liao)的(de)(de)(de)切(qie)(qie)(qie)割(ge)(ge)加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)主要(yao)采用(yong)(yong)各種(zhong)金(jin)(jin)剛(gang)石(shi)(shi)(shi)切(qie)(qie)(qie)割(ge)(ge)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)具。由(you)于(yu)金(jin)(jin)剛(gang)石(shi)(shi)(shi)是自(zi)然界已知的(de)(de)(de)硬(ying)物質,其優異(yi)性能決定其在石(shi)(shi)(shi)材(cai)(cai)(cai)(cai)(cai)(cai)(cai)等硬(ying)脆材(cai)(cai)(cai)(cai)(cai)(cai)(cai)料(liao)切(qie)(qie)(qie)割(ge)(ge)加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)領(ling)域(yu)具有(you)(you)廣闊(kuo)的(de)(de)(de)發展前景。應用(yong)(yong)金(jin)(jin)剛(gang)石(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)具鋸(ju)(ju)(ju)切(qie)(qie)(qie)硬(ying)脆材(cai)(cai)(cai)(cai)(cai)(cai)(cai)料(liao)的(de)(de)(de)加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)方式主要(yao)有(you)(you)圓鋸(ju)(ju)(ju)片切(qie)(qie)(qie)割(ge)(ge)、金(jin)(jin)剛(gang)石(shi)(shi)(shi)帶鋸(ju)(ju)(ju)切(qie)(qie)(qie)割(ge)(ge)、金(jin)(jin)剛(gang)石(shi)(shi)(shi)框架鋸(ju)(ju)(ju)切(qie)(qie)(qie)割(ge)(ge)、金(jin)(jin)剛(gang)石(shi)(shi)(shi)串(chuan)珠繩鋸(ju)(ju)(ju)切(qie)(qie)(qie)割(ge)(ge)等。重(zhong)慶石(shi)(shi)(shi)材(cai)(cai)(cai)(cai)(cai)(cai)(cai)加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)盡(jin)管每種(zhong)方法有(you)(you)不(bu)同的(de)(de)(de)特點和(he)(he)應用(yong)(yong)范圍,但其切(qie)(qie)(qie)割(ge)(ge)機理(li)(li)(li)和(he)(he)金(jin)(jin)剛(gang)石(shi)(shi)(shi)磨(mo)損(sun)機理(li)(li)(li)卻(que)大致(zhi)相(xiang)同。由(you)于(yu)切(qie)(qie)(qie)割(ge)(ge)石(shi)(shi)(shi)材(cai)(cai)(cai)(cai)(cai)(cai)(cai)是金(jin)(jin)剛(gang)石(shi)(shi)(shi)切(qie)(qie)(qie)割(ge)(ge)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)具主要(yao)的(de)(de)(de)用(yong)(yong)途,因(yin)此,深(shen)入研究石(shi)(shi)(shi)材(cai)(cai)(cai)(cai)(cai)(cai)(cai)鋸(ju)(ju)(ju)切(qie)(qie)(qie)機理(li)(li)(li)和(he)(he)金(jin)(jin)剛(gang)石(shi)(shi)(shi)切(qie)(qie)(qie)割(ge)(ge)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)具的(de)(de)(de)磨(mo)損(sun)機理(li)(li)(li)對于(yu)金(jin)(jin)剛(gang)石(shi)(shi)(shi)切(qie)(qie)(qie)割(ge)(ge)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)具的(de)(de)(de)合理(li)(li)(li)制(zhi)造與正確使用(yong)(yong)具有(you)(you)重(zhong)要(yao)意義。

柳州建筑爵士白大理石廠

柳州建筑爵士白大理石天(tian)(tian)然(ran)石(shi)(shi)(shi)材硬(ying)(ying)(ying)度(du)大,脆性(xing)(xing)大,不(bu)(bu)耐(nai)(nai)撞擊(ji),易破碎,耐(nai)(nai)沖擊(ji)性(xing)(xing)比天(tian)(tian)然(ran)石(shi)(shi)(shi)材好。(4)加(jia)工(gong)制作(zuo)方便。人(ren)造(zao)(zao)石(shi)(shi)(shi)的(de)(de)硬(ying)(ying)(ying)度(du)和(he)韌性(xing)(xing)已調整到一定范圍。可(ke)(ke)(ke)(ke)以(yi)像做硬(ying)(ying)(ying)木一樣加(jia)工(gong),凡是(shi)(shi)木工(gong)用(yong)(yong)(yong)的(de)(de)工(gong)具和(he)機械設備都可(ke)(ke)(ke)(ke)以(yi)用(yong)(yong)(yong)于(yu)人(ren)造(zao)(zao)石(shi)(shi)(shi)材的(de)(de)制作(zuo)加(jia)工(gong),可(ke)(ke)(ke)(ke)粘接(jie)(利用(yong)(yong)(yong)專用(yong)(yong)(yong)膠(jiao)水,各種(zhong)(zhong)臺(tai)面均可(ke)(ke)(ke)(ke)接(jie)得“天(tian)(tian)衣無縫(feng)”),可(ke)(ke)(ke)(ke)彎曲,可(ke)(ke)(ke)(ke)加(jia)工(gong)成各種(zhong)(zhong)形狀,這是(shi)(shi)天(tian)(tian)然(ran)石(shi)(shi)(shi)材無法比擬的(de)(de)。(5)結(jie)構致密,清潔衛生,天(tian)(tian)然(ran)石(shi)(shi)(shi)材存在著天(tian)(tian)然(ran)微孔,在做櫥(chu)柜的(de)(de)臺(tai)面時,菜(cai)湯等(deng)營(ying)養物(wu)質易滲(shen)入其(qi)(qi)內,滋生細(xi)菌;而(er)人(ren)造(zao)(zao)石(shi)(shi)(shi)材結(jie)構致密,無微孔,液體(ti)物(wu)質不(bu)(bu)能滲(shen)入,細(xi)菌不(bu)(bu)能在其(qi)(qi)中生長,故有些商(shang)家把人(ren)造(zao)(zao)石(shi)(shi)(shi)炒作(zuo)為“抗菌石(shi)(shi)(shi)”也有其(qi)(qi)道理。人(ren)造(zao)(zao)石(shi)(shi)(shi)材從誕生至(zhi)今經歷幾(ji)十年的(de)(de)研(yan)究、開發和(he)創新,使人(ren)造(zao)(zao)石(shi)(shi)(shi)材能開發多種(zhong)(zhong)材料(liao)廣泛應用(yong)(yong)(yong)與商(shang)業、住宅、甚(shen)至(zhi)軍(jun)事領域等(deng)。在商(shang)業用(yong)(yong)(yong)途上,人(ren)造(zao)(zao)石(shi)(shi)(shi)材的(de)(de)使用(yong)(yong)(yong)幾(ji)乎不(bu)(bu)受限制。根據(ju)產(chan)品(pin)的(de)(de)適應性(xing)(xing),它可(ke)(ke)(ke)(ke)用(yong)(yong)(yong)于(yu)健(jian)康中心、醫(yi)療機構、公(gong)共寫字樓、廠礦公(gong)司、購物(wu)中心等(deng)空(kong)間里的(de)(de)設備設施。當(dang)它作(zuo)用(yong)(yong)(yong)于(yu)柜臺(tai)、墻體(ti)、水槽、展示(shi)架、家具、電梯等(deng)器物(wu)時,色彩紋理設計獨(du)特的(de)(de)人(ren)造(zao)(zao)石(shi)(shi)(shi)材無不(bu)(bu)顯示(shi)其(qi)(qi)體(ti)貼(tie)、溫暖、可(ke)(ke)(ke)(ke)塑性(xing)(xing)強、可(ke)(ke)(ke)(ke)自(zi)由切裁、彎曲、研(yan)磨(mo)、接(jie)合耐(nai)(nai)久等(deng)卓越性(xing)(xing)能,產(chan)品(pin)的(de)(de)這些特點(dian),是(shi)(shi)消費者在使用(yong)(yong)(yong)時可(ke)(ke)(ke)(ke)以(yi)大膽創作(zuo),保持(chi)美感。人(ren)造(zao)(zao)石(shi)(shi)(shi)材可(ke)(ke)(ke)(ke)以(yi)根據(ju)使用(yong)(yong)(yong)的(de)(de)需要做成各種(zhong)(zhong)應用(yong)(yong)(yong)等(deng)級(ji)的(de)(de)材料(liao),是(shi)(shi)衛生環(huan)保材料(liao),實心無孔,毫無隱(yin)污納垢的(de)(de)空(kong)洞或縫(feng)隙。其(qi)(qi)表面接(jie)縫(feng)非常緊密,不(bu)(bu)會被(bei)水滲(shen)透。

柳州建筑爵士白大理石廠

在家居(ju)裝飾方面(mian),人(ren)(ren)造(zao)石(shi)(shi)材(cai)優(you)越(yue)于(yu)一(yi)般(ban)傳統建材(cai)所沒有(you)的(de)(de)(de)(de)耐酸、耐堿、耐冷熱、抗(kang)沖擊的(de)(de)(de)(de)特(te)點,作(zuo)為一(yi)種(zhong)(zhong)(zhong)質感佳、色彩(cai)多(duo)的(de)(de)(de)(de)飾材(cai),不(bu)(bu)僅能(neng)美化(hua)(hua)是內外裝飾,滿足其(qi)設(she)計(ji)(ji)上(shang)的(de)(de)(de)(de)多(duo)樣(yang)(yang)化(hua)(hua)需求(qiu),更能(neng)為建筑師和(he)設(she)計(ji)(ji)師提供極為廣(guang)泛(fan)的(de)(de)(de)(de)設(she)計(ji)(ji)空間,以(yi)創造(zao)空間,表達自(zi)然(ran)感覺。人(ren)(ren)造(zao)石(shi)(shi)材(cai)可(ke)以(yi)根據不(bu)(bu)同的(de)(de)(de)(de)要求(qiu)配(pei)方做成(cheng)(cheng)一(yi)種(zhong)(zhong)(zhong)先進(jin)的(de)(de)(de)(de)合(he)成(cheng)(cheng)物,因(yin)其(qi)特(te)殊的(de)(de)(de)(de)組成(cheng)(cheng)成(cheng)(cheng)份,使它很難被磨損,又(you)由于(yu)顏(yan)色和(he)圖案深及(ji)材(cai)料表里,因(yin)此,可(ke)以(yi)對才質中凹(ao)紋、缺口(kou)或刮痕甚至比較嚴重的(de)(de)(de)(de)磨損,只要采取相應的(de)(de)(de)(de)辦法進(jin)行翻新,便可(ke)回復如初,向新的(de)(de)(de)(de)一(yi)樣(yang)(yang)。許多(duo)家庭在居(ju)室的(de)(de)(de)(de)廚房和(he)衛生間的(de)(de)(de)(de)裝修中都(dou)(dou)采用了(le)人(ren)(ren)造(zao)石(shi)(shi)材(cai)作(zuo)臺面(mian)。由于(yu)人(ren)(ren)造(zao)石(shi)(shi)材(cai)是模仿(fang)天(tian)(tian)然(ran)大(da)理(li)石(shi)(shi)的(de)(de)(de)(de)表面(mian)紋理(li)加(jia)工(gong)而成(cheng)(cheng)的(de)(de)(de)(de),具有(you)類(lei)似大(da)理(li)石(shi)(shi)的(de)(de)(de)(de)機理(li)特(te)點,在硬度、光澤(ze)及(ji)耐磨性上(shang)都(dou)(dou)比天(tian)(tian)然(ran)大(da)理(li)石(shi)(shi)好,這種(zhong)(zhong)(zhong)樹脂(zhi)黏(nian)度低(di),易于(yu)成(cheng)(cheng)型、固化(hua)(hua)快,可(ke)在常溫下(xia)固化(hua)(hua)。而且,人(ren)(ren)造(zao)石(shi)(shi)材(cai)色澤(ze)、紋理(li)細膩(ni),花(hua)紋圖案可(ke)以(yi)由設(she)計(ji)(ji)者(zhe)自(zi)行控制確定,可(ke)任意塑造(zao)成(cheng)(cheng)100多(duo)種(zhong)(zhong)(zhong)色彩(cai)斑斕、感覺優(you)雅的(de)(de)(de)(de)不(bu)(bu)同品種(zhong)(zhong)(zhong)。豐富(fu)的(de)(de)(de)(de)色彩(cai)想象、天(tian)(tian)然(ran)的(de)(de)(de)(de)色素和(he)不(bu)(bu)同材(cai)質的(de)(de)(de)(de)結合(he)可(ke)以(yi)創造(zao)出(chu)繽紛的(de)(de)(de)(de)色系。

柳州建筑爵士白大理石廠

毛邊石(shi)(shi)(shi)材(cai)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)技(ji)(ji)能(neng)毛邊重(zhong)慶石(shi)(shi)(shi)材(cai)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)技(ji)(ji)能(neng)是根(gen)據(ju)計(ji)劃或用戶(hu)需要(yao)(yao),在已開(kai)掘或切(qie)開(kai)的(de)(de)(de)(de)(de)塊石(shi)(shi)(shi)、條石(shi)(shi)(shi)、石(shi)(shi)(shi)板的(de)(de)(de)(de)(de)外表進(jin)行加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)的(de)(de)(de)(de)(de)。加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)品(pin)(pin)種有(you)粗鑿光(guang)(guang)(guang)(一(yi)(yi)步做鑿)、細鑿光(guang)(guang)(guang)(二(er)步做鑿,或稱點光(guang)(guang)(guang)、豆光(guang)(guang)(guang)、瞪砂地)、一(yi)(yi)斧(fu)(fu)光(guang)(guang)(guang)(一(yi)(yi)遍(bian)(bian)剁斧(fu)(fu))、二(er)斧(fu)(fu)光(guang)(guang)(guang)(二(er)遍(bian)(bian)剁斧(fu)(fu))、三斧(fu)(fu)光(guang)(guang)(guang)(三遍(bian)(bian)剁斧(fu)(fu))、機刨(bao)光(guang)(guang)(guang)、亞(ya)光(guang)(guang)(guang)(粗磨光(guang)(guang)(guang))、細磨光(guang)(guang)(guang)等幾(ji)種。傳統(tong)的(de)(de)(de)(de)(de)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)是在毛坯的(de)(de)(de)(de)(de)塊石(shi)(shi)(shi)(荒(huang)料(liao))、條石(shi)(shi)(shi)、石(shi)(shi)(shi)板的(de)(de)(de)(de)(de)基礎上進(jin)行分品(pin)(pin)種、分層次加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong),根(gen)據(ju)用戶(hu)需要(yao)(yao)有(you)粗鑿光(guang)(guang)(guang)至細磨光(guang)(guang)(guang)逐遍(bian)(bian)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)。例如,用戶(hu)需要(yao)(yao)二(er)斧(fu)(fu)光(guang)(guang)(guang),須經粗鑿、細鑿、一(yi)(yi)遍(bian)(bian)斧(fu)(fu)、二(er)遍(bian)(bian)斧(fu)(fu)才行。根(gen)據(ju)用戶(hu)的(de)(de)(de)(de)(de)需要(yao)(yao),重(zhong)慶石(shi)(shi)(shi)材(cai)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)主要(yao)(yao)由以下幾(ji)種層次的(de)(de)(de)(de)(de)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)技(ji)(ji)能(neng):(1)毛坯的(de)(de)(de)(de)(de)塊石(shi)(shi)(shi)、條石(shi)(shi)(shi)、石(shi)(shi)(shi)板筑方的(de)(de)(de)(de)(de)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)技(ji)(ji)能(neng)。(2)墻面線槽的(de)(de)(de)(de)(de)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)技(ji)(ji)能(neng)。(3)線(腳)條的(de)(de)(de)(de)(de)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)技(ji)(ji)能(neng)。(4)圓形柱或柱座加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)技(ji)(ji)能(neng)(不(bu)管全體或拼(pin)裝)。(5)建筑飾面的(de)(de)(de)(de)(de)花飾、雕琢(即(ji)浮(fu)雕、圓雕)。(6)蘑菇(gu)石(shi)(shi)(shi)與天然面(劈毛石(shi)(shi)(shi))的(de)(de)(de)(de)(de)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)技(ji)(ji)能(neng)(用塊石(shi)(shi)(shi)、條石(shi)(shi)(shi)制作(zuo))。重(zhong)慶石(shi)(shi)(shi)材(cai)加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)為你解析傳統(tong)的(de)(de)(de)(de)(de)石(shi)(shi)(shi)材(cai)由于加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)設(she)備和加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)技(ji)(ji)術捆綁,以及(ji)要(yao)(yao)作(zuo)為承重(zhong)的(de)(de)(de)(de)(de)構(gou)造(zao)構(gou)件,所以加(jia)(jia)(jia)(jia)工(gong)(gong)(gong)(gong)出(chu)來的(de)(de)(de)(de)(de)石(shi)(shi)(shi)材(cai)制品(pin)(pin)一(yi)(yi)般比照厚重(zhong)、粗糙(cao),但這些(xie)石(shi)(shi)(shi)材(cai)制品(pin)(pin)難以日益翻開(kai)和精(jing)雕細鏤(lou)的(de)(de)(de)(de)(de)需求。

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