ISO 228-2-1987 Pipe threads where pressure-tight joints are not made on the threads; Part 2 VerificaISO 228-2-1987 Pipe threads where pressure-tight joints are not made on the threads; Part 2 Verification by means of limit gauges
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。