緊固件選用常用標準
①.GB/T41《1型(xing)(xing)(xing)六角(jiao)螺(luo)母(mu)C級(ji)》②.GB/T6170《1型(xing)(xing)(xing)六角(jiao)螺(luo)母(mu)A級(ji)和B級(ji)》③.GB/T6171《1型(xing)(xing)(xing)六角(jiao)螺(luo)母(mu)細(xi)牙(ya)A級(ji)和B級(ji)》④.GB/T6176《1型(xing)(xing)(xing)六角(jiao)螺(luo)母(mu)一細(xi)牙(ya)A級(ji)和B級(ji)》⑤.GB/T897~900《雙頭螺(luo)柱(zhu)》⑥.GB/T901《等長(chang)雙頭螺(luo)柱(zhu)...