ISO 4779:1986 M（4）级钢链条用有尖和环的锻钢起重钩

标准编号：ISO 4779:1986

中文名称：M（4）级钢链条用有尖和环的锻钢起重钩

英文名称：Forged steel lifting hooks with point and eye for use with steel chains of grade M(4)