BS 4942-2-1981 Short link chain for lifting purposes. Specification for grade M (4) non-calibrated cBS 4942-2-1981 Short link chain for lifting purposes. Specification for grade M (4) non-calibrated chain
部份国外标准涉及版权问题,所以全部国外标准于2013年02月,全部删除!相关页面仅提供参考消息。