1cs11.120;23.040.01;n.120.soG91HG备案号3922一1999中华人民共和国化工行业标准HG厅3651-1999钦制对焊无缝管件Unalloyedtitaniumandtitani...
ICS71.120;23.040.01;77.120.50G91备案号3922一1999人/、国千了杨:HG厅3651—1999钦制对焊fUnalloy函曲血mandti血i皿吐oybutt-weldingseam...
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