例句>> 2) rifle color coating 枪色镀层 1. Spectrophotometry was employed in the determination of tin,nickel,copper and molybdenum in rifle color coating. 采用分光光度法测定了枪色镀层中锡、镍、铜及钼的含量,取样量仅为0。3) gun-black 枪黑色 1. Electroplating process of gun-black color ...