Is that box made of tin or steel?
这个盒子是做的还是铁做的?
Is that box made of tin or steel?
这个盒子是做的还是铁做的?
An impure oxide of cobalt, used to produce a blue color in enamel and in the making of smalt.
浅的绿蓝色颜料,主要由钴和的氧化物组成。
Objective:To develop a GC-MS approach for the determination of tripropyltin(TPrT),tributyltin(TBT) and triphenyltin(TPhT) in fish.
建立水产品中丙、丁和苯的气相色谱-质谱(GC-MS)分析方法。
The lead content gives terneplate a dull appearance, a noncorrosive surface, and solderability.
铅的融入使镀铅钢板具有暗淡的外观、抗腐性的表面和可焊接性。
Cu-Sn alloy coating with different Sn content can be replacement plating out on iron and steel surface in a solution comprising of copper sulfate, stanous sulfate, complexant and stabilization agent.
铁件在由、亚、络合剂、稳定剂等组成的溶液中,可以置换镀覆不同质量分数的- 合金镀层,其工艺可替代氰化物预镀,消除氰化物污染,是实现电镀清洁生产措施之一。
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