久久精品aⅴ无码中文字字幕重口,蜜桃久久久电影,欧美最猛,日韩天天射

opper alloys

銅

合

金

Cu 107

ECu

Red copper, atmosphere and sea water corrosion and excellent electric conductivity. Welding of red copper such as electrical copper row.
紫銅，耐大氣，海水腐蝕，導(dǎo)電性好。紫銅焊接用，如導(dǎo)電銅排

ECu

Cu 207

ECuSi

Silicon bronze, corrosion resistance and high strength. Welding of copper, silicon bronze and brass.
硅青銅，耐蝕、強(qiáng)度高。銅、硅青銅及黃銅焊接用

ECuSi

Cu 227

ECuSnB

Tin phosphor bronze, corrosion resistance and high strength. Welding of copper, silicon bronze and brass.
錫磷青銅，耐蝕、強(qiáng)度高。銅、硅青銅及黃銅焊接用

ECuSn-C

Cu 237

ECuAl

Aluminum bronze, wear and corrosion and high strength. Welding or surfacing of copper alloys.
鋁青銅，耐磨、耐蝕，強(qiáng)度高。銅合金焊接或堆焊用