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江岸建筑星空灰大理石廠

2022-03-14
江岸建筑星空灰大理石廠

天(tian)然石(shi)材(cai)(cai)(cai)硬度大(da),脆性(xing)(xing)大(da),不(bu)耐(nai)撞擊(ji),易破碎,耐(nai)沖(chong)擊(ji)性(xing)(xing)比(bi)天(tian)然石(shi)材(cai)(cai)(cai)好(hao)。(4)加(jia)工(gong)(gong)制(zhi)(zhi)作(zuo)方便。人(ren)(ren)(ren)造(zao)石(shi)的(de)(de)硬度和(he)韌(ren)性(xing)(xing)已調整到一定范圍。可(ke)以(yi)像做(zuo)(zuo)硬木一樣加(jia)工(gong)(gong),凡(fan)是(shi)木工(gong)(gong)用(yong)(yong)(yong)(yong)(yong)的(de)(de)工(gong)(gong)具和(he)機(ji)械設備(bei)都(dou)可(ke)以(yi)用(yong)(yong)(yong)(yong)(yong)于(yu)人(ren)(ren)(ren)造(zao)石(shi)材(cai)(cai)(cai)的(de)(de)制(zhi)(zhi)作(zuo)加(jia)工(gong)(gong),可(ke)粘接(利用(yong)(yong)(yong)(yong)(yong)專用(yong)(yong)(yong)(yong)(yong)膠水(shui),各(ge)(ge)種(zhong)(zhong)臺面(mian)均可(ke)接得“天(tian)衣無(wu)縫”),可(ke)彎(wan)(wan)曲,可(ke)加(jia)工(gong)(gong)成(cheng)各(ge)(ge)種(zhong)(zhong)形狀,這(zhe)是(shi)天(tian)然石(shi)材(cai)(cai)(cai)無(wu)法比(bi)擬(ni)的(de)(de)。(5)結構(gou)致密,清(qing)潔衛(wei)生(sheng),天(tian)然石(shi)材(cai)(cai)(cai)存在(zai)著天(tian)然微(wei)孔(kong),在(zai)做(zuo)(zuo)櫥(chu)柜的(de)(de)臺面(mian)時(shi),菜湯等營養物(wu)質易滲(shen)(shen)入其內,滋生(sheng)細(xi)菌(jun)(jun);而人(ren)(ren)(ren)造(zao)石(shi)材(cai)(cai)(cai)結構(gou)致密,無(wu)微(wei)孔(kong),液體(ti)物(wu)質不(bu)能(neng)(neng)滲(shen)(shen)入,細(xi)菌(jun)(jun)不(bu)能(neng)(neng)在(zai)其中生(sheng)長,故(gu)有些商(shang)(shang)家(jia)把(ba)人(ren)(ren)(ren)造(zao)石(shi)炒作(zuo)為“抗菌(jun)(jun)石(shi)”也(ye)有其道理。人(ren)(ren)(ren)造(zao)石(shi)材(cai)(cai)(cai)從(cong)誕生(sheng)至(zhi)今經(jing)歷幾(ji)(ji)十年的(de)(de)研(yan)究、開(kai)發和(he)創(chuang)新,使(shi)(shi)(shi)人(ren)(ren)(ren)造(zao)石(shi)材(cai)(cai)(cai)能(neng)(neng)開(kai)發多(duo)種(zhong)(zhong)材(cai)(cai)(cai)料(liao)廣泛應用(yong)(yong)(yong)(yong)(yong)與(yu)商(shang)(shang)業(ye)、住宅、甚至(zhi)軍事領域等。在(zai)商(shang)(shang)業(ye)用(yong)(yong)(yong)(yong)(yong)途上(shang),人(ren)(ren)(ren)造(zao)石(shi)材(cai)(cai)(cai)的(de)(de)使(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)幾(ji)(ji)乎不(bu)受限(xian)制(zhi)(zhi)。根據(ju)產(chan)品(pin)的(de)(de)適(shi)應性(xing)(xing),它可(ke)用(yong)(yong)(yong)(yong)(yong)于(yu)健康中心(xin)、醫療(liao)機(ji)構(gou)、公共寫字樓、廠礦公司、購物(wu)中心(xin)等空(kong)間里的(de)(de)設備(bei)設施。當它作(zuo)用(yong)(yong)(yong)(yong)(yong)于(yu)柜臺、墻體(ti)、水(shui)槽、展示架(jia)、家(jia)具、電(dian)梯等器物(wu)時(shi),色彩紋(wen)理設計獨特的(de)(de)人(ren)(ren)(ren)造(zao)石(shi)材(cai)(cai)(cai)無(wu)不(bu)顯(xian)示其體(ti)貼、溫(wen)暖、可(ke)塑(su)性(xing)(xing)強、可(ke)自(zi)由切裁、彎(wan)(wan)曲、研(yan)磨(mo)、接合耐(nai)久等卓越(yue)性(xing)(xing)能(neng)(neng),產(chan)品(pin)的(de)(de)這(zhe)些特點,是(shi)消費(fei)者在(zai)使(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)時(shi)可(ke)以(yi)大(da)膽創(chuang)作(zuo),保持美感(gan)。人(ren)(ren)(ren)造(zao)石(shi)材(cai)(cai)(cai)可(ke)以(yi)根據(ju)使(shi)(shi)(shi)用(yong)(yong)(yong)(yong)(yong)的(de)(de)需要做(zuo)(zuo)成(cheng)各(ge)(ge)種(zhong)(zhong)應用(yong)(yong)(yong)(yong)(yong)等級的(de)(de)材(cai)(cai)(cai)料(liao),是(shi)衛(wei)生(sheng)環保材(cai)(cai)(cai)料(liao),實心(xin)無(wu)孔(kong),毫無(wu)隱(yin)污納垢的(de)(de)空(kong)洞或縫隙(xi)。其表面(mian)接縫非(fei)常(chang)緊密,不(bu)會被水(shui)滲(shen)(shen)透。

江岸建筑星空灰大理石廠

江岸建筑星空灰大理石加(jia)裝隔(ge)聲罩用(yong)隔(ge)聲罩來降低鋸片(pian)加(jia)工(gong)時的(de)綜(zong)合噪(zao)聲是(shi)行之有效的(de),罩殼用(yong)鋼(gang)板(ban)(ban)制成,內涂阻尼(ni)材(cai)(cai)(cai)(cai)料、吸聲材(cai)(cai)(cai)(cai)料,選擇(ze)超細玻璃棉,襯一層玻璃布。并用(yong)穿孔(kong)板(ban)(ban)護(hu)面。罩殼、吸聲材(cai)(cai)(cai)(cai)料、穿孔(kong)板(ban)(ban)相對(dui)固定(ding)以防(fang)止設(she)(she)備(bei)運轉造(zao)成系統共(gong)振(zhen)引(yin)起新的(de)噪(zao)音。措施與能達到的(de)降噪(zao)效果:(1)基(ji)體(ti)采(cai)用(yong)復合結構可以降噪(zao)10分(fen)貝(bei)(bei)左右(you)(2)減(jian)振(zhen)法蘭盤可以降噪(zao)3分(fen)貝(bei)(bei)左右(you)(3)基(ji)體(ti)采(cai)用(yong)消(xiao)音孔(kong)或消(xiao)音縫5分(fen)貝(bei)(bei)左右(you)(4)整(zheng)體(ti)隔(ge)音罩10分(fen)貝(bei)(bei)左右(you)簡析人造(zao)石的(de)用(yong)途(tu)人造(zao)石材(cai)(cai)(cai)(cai)從誕生至今經歷幾十年的(de)研究、開(kai)發(fa)和創新,使(shi)人造(zao)石材(cai)(cai)(cai)(cai)能開(kai)發(fa)多種材(cai)(cai)(cai)(cai)料廣泛(fan)應(ying)(ying)用(yong)與商業(ye)、住宅、甚至軍(jun)事領域等(deng)。在(zai)商業(ye)用(yong)途(tu)上,人造(zao)石材(cai)(cai)(cai)(cai)的(de)使(shi)用(yong)幾乎不受限(xian)制。根(gen)據產品的(de)適應(ying)(ying)性,它可用(yong)于(yu)健康中(zhong)心、醫(yi)療(liao)機構、公共(gong)寫字樓、廠(chang)礦(kuang)公司、購物中(zhong)心等(deng)空(kong)間里的(de)設(she)(she)備(bei)設(she)(she)施。

江岸建筑星空灰大理石廠

純天然(ran)材(cai)(cai)(cai)(cai)質沒(mei)有(you)(you)(you)污(wu)染,沒(mei)有(you)(you)(you)輻射,具有(you)(you)(you)豐(feng)富(fu)的(de)(de)(de)石(shi)(shi)(shi)(shi)文化(hua)的(de)(de)(de)底(di)蘊,重(zhong)慶(qing)青石(shi)(shi)(shi)(shi)板材(cai)(cai)(cai)(cai)會(hui)(hui)給人(ren)一(yi)種不(bu)一(yi)樣的(de)(de)(de)視覺效果。在以(yi)后的(de)(de)(de)建筑裝飾中,青石(shi)(shi)(shi)(shi)板材(cai)(cai)(cai)(cai)的(de)(de)(de)使用(yong)與影響力會(hui)(hui)進一(yi)步擴(kuo)大(da)。重(zhong)慶(qing)石(shi)(shi)(shi)(shi)材(cai)(cai)(cai)(cai)加(jia)(jia)工(gong)(gong)廠(chang)跟著(zhu)咱(zan)(zan)們(men)(men)(men)審美曉得(de)(de)的(de)(de)(de)跋涉,咱(zan)(zan)們(men)(men)(men)對(dui)于(yu)(yu)美的(de)(de)(de)尋求(qiu)(qiu)也(ye)(ye)(ye)(ye)越來越期望(wang),崇尚天然(ran)也(ye)(ye)(ye)(ye)成了(le)一(yi)種時代需求(qiu)(qiu),而(er)(er)(er)(er)(er)石(shi)(shi)(shi)(shi)材(cai)(cai)(cai)(cai)產品因(yin)為(wei)其來自(zi)于(yu)(yu)天然(ran),又帶著(zhu)濃(nong)郁的(de)(de)(de)天然(ran)顏色(se),所(suo)以(yi)它的(de)(de)(de)運用(yong)也(ye)(ye)(ye)(ye)越來越廣,翻開速度(du)也(ye)(ye)(ye)(ye)越來越快。從各種的(de)(de)(de)石(shi)(shi)(shi)(shi)材(cai)(cai)(cai)(cai)貼圖上(shang)咱(zan)(zan)們(men)(men)(men)不(bu)難(nan)發現,天然(ran)石(shi)(shi)(shi)(shi)材(cai)(cai)(cai)(cai)有(you)(you)(you)著(zhu)人(ren)工(gong)(gong)石(shi)(shi)(shi)(shi)材(cai)(cai)(cai)(cai)所(suo)沒(mei)有(you)(you)(you)的(de)(de)(de)天然(ran)的(de)(de)(de)瑰麗顏色(se),而(er)(er)(er)(er)(er)且它們(men)(men)(men)的(de)(de)(de)物理(li)化(hua)學功用(yong)也(ye)(ye)(ye)(ye)愈加(jia)(jia)安穩,而(er)(er)(er)(er)(er)且其便于(yu)(yu)加(jia)(jia)工(gong)(gong),所(suo)以(yi)它們(men)(men)(men)不(bu)只被運用(yong)于(yu)(yu)建筑裝修領域,而(er)(er)(er)(er)(er)且也(ye)(ye)(ye)(ye)一(yi)般用(yong)于(yu)(yu)制(zhi)(zhi)作各種的(de)(de)(de)石(shi)(shi)(shi)(shi)材(cai)(cai)(cai)(cai)技(ji)術品,乃(nai)至(zhi)是(shi)日子用(yong)具也(ye)(ye)(ye)(ye)由(you)石(shi)(shi)(shi)(shi)材(cai)(cai)(cai)(cai)制(zhi)(zhi)作而(er)(er)(er)(er)(er)成,這也(ye)(ye)(ye)(ye)促(cu)進了(le)石(shi)(shi)(shi)(shi)材(cai)(cai)(cai)(cai)加(jia)(jia)工(gong)(gong)設備的(de)(de)(de)翻開。現在,咱(zan)(zan)們(men)(men)(men)研制(zhi)(zhi)出(chu)了(le)數控技(ji)術,據(ju)九正建材(cai)(cai)(cai)(cai)網曉得(de)(de),數控技(ji)術的(de)(de)(de)融入(ru),使得(de)(de)石(shi)(shi)(shi)(shi)材(cai)(cai)(cai)(cai)雕刻技(ji)術有(you)(you)(you)了(le)更(geng)快的(de)(de)(de)翻開,質量也(ye)(ye)(ye)(ye)有(you)(you)(you)了(le)更(geng)大(da)的(de)(de)(de)跋涉,然(ran)后能(neng)夠使石(shi)(shi)(shi)(shi)雕制(zhi)(zhi)品完結(jie)計(ji)劃化(hua)出(chu)產,重(zhong)慶(qing)石(shi)(shi)(shi)(shi)材(cai)(cai)(cai)(cai)加(jia)(jia)工(gong)(gong)機械(xie)化(hua)程度(du)更(geng)高了(le),自(zi)動化(hua)出(chu)產也(ye)(ye)(ye)(ye)使得(de)(de)產品的(de)(de)(de)計(ji)劃更(geng)大(da)了(le),而(er)(er)(er)(er)(er)且也(ye)(ye)(ye)(ye)極好地處理(li)了(le)人(ren)力疑(yi)問,功率也(ye)(ye)(ye)(ye)跋涉警(jing)惕了(le)。

江岸建筑星空灰大理石廠

石(shi)(shi)材(cai)(cai)(cai)拼(pin)(pin)(pin)花(hua)補膠(jiao)、研(yan)磨及相關(guan)注(zhu)意事項石(shi)(shi)材(cai)(cai)(cai)拼(pin)(pin)(pin)花(hua),是(shi)一種(zhong)常見的(de)(de)石(shi)(shi)材(cai)(cai)(cai)裝(zhuang)飾效(xiao)果。這種(zhong)工(gong)藝(yi),其實從古至今(jin)都有(you)(you)。并(bing)且(qie)隨著現代設計(ji)和制作技術的(de)(de)進步,漂亮的(de)(de)石(shi)(shi)材(cai)(cai)(cai)拼(pin)(pin)(pin)花(hua),大有(you)(you)方興未艾之勢。我(wo)(wo)們(men)做(zuo)(zuo)石(shi)(shi)材(cai)(cai)(cai)護(hu)理工(gong)程(cheng),將來遇到石(shi)(shi)材(cai)(cai)(cai)拼(pin)(pin)(pin)花(hua)的(de)(de)機會,也會越(yue)來越(yue)多。本期我(wo)(wo)們(men)就(jiu)介紹下(xia)石(shi)(shi)材(cai)(cai)(cai)拼(pin)(pin)(pin)花(hua)的(de)(de)補膠(jiao)、研(yan)磨等環節的(de)(de)工(gong)藝(yi)。材(cai)(cai)(cai)料概念石(shi)(shi)材(cai)(cai)(cai)拼(pin)(pin)(pin)花(hua)設計(ji),是(shi)指利用(yong)天然石(shi)(shi)材(cai)(cai)(cai)的(de)(de)不同色澤(ze),通過設計(ji)和加(jia)工(gong),拼(pin)(pin)(pin)裝(zhuang)成不同花(hua)型(xing)、圖案、logo等各(ge)類(lei)效(xiao)果的(de)(de)石(shi)(shi)材(cai)(cai)(cai)裝(zhuang)飾藝(yi)術。材(cai)(cai)(cai)料類(lei)型(xing)得益于技術的(de)(de)進步,現代石(shi)(shi)材(cai)(cai)(cai)拼(pin)(pin)(pin)花(hua)設計(ji),可謂“沒有(you)(you)做(zuo)(zuo)不到,只有(you)(you)想不到”——類(lei)型(xing)眾多,且(qie)幾乎(hu)隨時都有(you)(you)新的(de)(de)設計(ji)和類(lei)型(xing)出現。因此,在這里我(wo)(wo)們(men)主要(yao)從石(shi)(shi)材(cai)(cai)(cai)護(hu)理的(de)(de)角度(du)出發,對(dui)拼(pin)(pin)(pin)花(hua)進行分類(lei)。這樣(yang)的(de)(de)分類(lei),對(dui)補膠(jiao)、研(yan)磨等工(gong)藝(yi),是(shi)有(you)(you)直(zhi)接的(de)(de)影響的(de)(de)。

江岸建筑星空灰大理石廠

有(you)規(gui)模(mo)儲量,可工(gong)業(ye)化開(kai)采。裝(zhuang)飾(shi)(shi)石(shi)(shi)(shi)材(cai)(cai)的(de)(de)規(gui)模(mo)儲量是(shi)該品(pin)種能(neng)否適合(he)工(gong)業(ye)化開(kai)采的(de)(de)前提(ti)條件,沒有(you)規(gui)模(mo)儲量無法進行工(gong)業(ye)化開(kai)采,其市(shi)場(chang)的(de)(de)持(chi)久(jiu)性就差(cha),重(zhong)慶青石(shi)(shi)(shi)板材(cai)(cai)經濟(ji)成本(ben)就高,形不成品(pin)牌。③理化性能(neng)符(fu)合(he)建筑與裝(zhuang)飾(shi)(shi)要求。(本(ben)書已有(you)專門的(de)(de)條目(mu)介紹其應(ying)符(fu)合(he)的(de)(de)性能(neng)要求)裝(zhuang)飾(shi)(shi)石(shi)(shi)(shi)材(cai)(cai)與建筑石(shi)(shi)(shi)材(cai)(cai)的(de)(de)區(qu)別(bie)在于多了(le)裝(zhuang)飾(shi)(shi)性,重(zhong)慶青石(shi)(shi)(shi)板材(cai)(cai)這是(shi)它和建筑石(shi)(shi)(shi)材(cai)(cai)的(de)(de)根本(ben)區(qu)別(bie)。重(zhong)慶石(shi)(shi)(shi)材(cai)(cai)加(jia)(jia)工(gong)之(zhi)飾(shi)(shi)面(mian)石(shi)(shi)(shi)材(cai)(cai)的(de)(de)加(jia)(jia)工(gong)重(zhong)慶石(shi)(shi)(shi)材(cai)(cai)加(jia)(jia)工(gong)開(kai)采出(chu)來的(de)(de)石(shi)(shi)(shi)材(cai)(cai)需(xu)(xu)送往加(jia)(jia)l J,按照設訓所需(xu)(xu)要的(de)(de)規(gui)格及(ji)表而(er)肌理,加(jia)(jia)l堿(jian)存類(lei)板材(cai)(cai)及(ji)一此特殊規(gui)格形狀(zhuang)的(de)(de)產品(pin)。荒(huang)料加(jia)(jia)l成板材(cai)(cai)后,表而(er)還(huan)要進行加(jia)(jia)l處理:機器研磨(mo)、火焰燒(shao)毛、鑿毛等(deng)。

江岸建筑星空灰大理石廠

重(zhong)慶石(shi)材(cai)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)為節約資源,走可(ke)(ke)持續發(fa)展的道路(lu),應充(chong)分利用(yong)資源,對于市場加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)剩下的廢料(liao)(liao)(liao)(如石(shi)渣、石(shi)粉、石(shi)屑(xie)),可(ke)(ke)以作為生產人(ren)造石(shi)材(cai)的加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)原料(liao)(liao)(liao)。石(shi)材(cai)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)流程鋸(ju)割(ge)(ge)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)--研磨(mo)(mo)拋光(guang)(guang)(guang)--切(qie)斷(duan)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)--鑿(zao)切(qie)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)--燒(shao)(shao)毛(mao)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)--輔助(zhu)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)及(ji)檢(jian)驗(yan)修(xiu)補(bu)1、鋸(ju)割(ge)(ge)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)鋸(ju)割(ge)(ge)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)是(shi)用(yong)鋸(ju)石(shi)機(ji)將(jiang)(jiang)花(hua)(hua)崗石(shi)荒(huang)料(liao)(liao)(liao)鋸(ju)割(ge)(ge)成毛(mao)板(ban)(ban)(一(yi)般(ban)厚(hou)度石(shi)材(cai)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)流程鋸(ju)割(ge)(ge)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)--研磨(mo)(mo)拋光(guang)(guang)(guang)--切(qie)斷(duan)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)--鑿(zao)切(qie)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)--燒(shao)(shao)毛(mao)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)--輔助(zhu)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)及(ji)檢(jian)驗(yan)修(xiu)補(bu)1、鋸(ju)割(ge)(ge)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)鋸(ju)割(ge)(ge)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)是(shi)用(yong)鋸(ju)石(shi)機(ji)將(jiang)(jiang)花(hua)(hua)崗石(shi)荒(huang)料(liao)(liao)(liao)鋸(ju)割(ge)(ge)成毛(mao)板(ban)(ban)(一(yi)般(ban)厚(hou)度為20mm或10mm),或條(tiao)狀(zhuang)、塊狀(zhuang)等形(xing)狀(zhuang)的半(ban)成品(pin)。該工(gong)(gong)序屬(shu)粗加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)工(gong)(gong)序,該工(gong)(gong)序對荒(huang)料(liao)(liao)(liao)的板(ban)(ban)材(cai)率、板(ban)(ban)材(cai)質量、企業的經濟效益有重(zhong)大影響。鋸(ju)割(ge)(ge)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)中主(zhu)要的加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)設備是(shi)花(hua)(hua)崗石(shi)專用(yong)的框架式(shi)大型自動加(jia)(jia)(jia)(jia)(jia)(jia)(jia)砂砂鋸(ju)、多刀片(pian)雙向切(qie)機(ji)、多刀片(pian)電腦控制花(hua)(hua)崗石(shi)切(qie)機(ji)和花(hua)(hua)崗石(shi)圓(yuan)盤鋸(ju)石(shi)機(ji)等。2、研磨(mo)(mo)拋光(guang)(guang)(guang)研磨(mo)(mo)拋光(guang)(guang)(guang)的目的是(shi)將(jiang)(jiang)鋸(ju)好的毛(mao)板(ban)(ban)進一(yi)步(bu)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong),使其厚(hou)度、平整度、光(guang)(guang)(guang)澤度達到要求。該工(gong)(gong)序首先需(xu)要要粗磨(mo)(mo)校平,然后(hou)逐步(bu)經過(guo)半(ban)細磨(mo)(mo)、細磨(mo)(mo)、精磨(mo)(mo)及(ji)拋光(guang)(guang)(guang),重(zhong)慶石(shi)材(cai)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)工(gong)(gong)把(ba)花(hua)(hua)崗巖的顏色紋理(li)完全展示出來(lai)。

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