GB 151-1999 tubular heat exchangers.pdf文档页数：168文档大小：13.25MB文档格式：pdf ICS 23.020.30 J 74 NationalStandardofthePeople'sRepublicofChina GB151-1999 TubularHeatExchangers Issued on 1999-02-26 Enforced on 2000-01-01 Issued by China State Bureau of...
在线咨询： QQ交谈
邮件：admin@qq.com
工作时间：周一至周五，9:30-18:30，节假日休息
