规格：M10 ~ M100(3/8 ~ 4'')
性能等级：
钢: ISO898:4 ~ 12; A194/A194M:2.2H, 2HM,3,4,6,7,7M,16;ASTM A563, A563M 
不锈钢: ISO3506: A2(50 ~ 80), A4(50 ~ 80), C1, C3;ASTM A194/A194M:8,8A,8M,
8MA,8T,8TA;ASTM F593/F593M