彩色玻璃板先经过蚀刻，然后用传统技法手工着色。The stained-glass panels are etched and then handpainted using traditional methods.那种酸在晶体表面蚀刻出一些小孔。The acid etched holes in the crystal surface.玛丽很喜爱蚀刻艺术.Mary is very keen on etching....
六亚甲基二异氰酸酯 ( HMDI ) 可用在预聚物中代替甲苯二异氰酸酯〔TDI〕.Hexamethylene diisocyanate ( HMDI ) may be used in prepolymer, in place of TDI.柯达叙述了一种直链的活性亚甲基两当量的黄成色剂.Kodak company describes open chain reactive methylene two - equivalent yello...