B631

B631 (银钨电接触材料的标准规范)· ASTM (美国) · 12 种材料

名称	材料组别
B631 Class A1	钨	chevron_right
B631 Class A2	钨	chevron_right
B631 Class A3	钨	chevron_right
B631 Class A4	钨	chevron_right
B631 Class B1	钨	chevron_right
B631 Class B2	钨	chevron_right
B631 Class B3	钨	chevron_right
B631 Class B4	钨	chevron_right
B631 Class C1	钨	chevron_right
B631 Class C2	钨	chevron_right
B631 Class C3	钨	chevron_right
B631 Class C4	钨	chevron_right