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咨询: CB/Z 121-1998 舰艇用921A等钢板缺陷补焊技术要求 Technical requirements of repair welding for defects on the 921A etc.steel plates used in naval ships 电话:010-88099016 ; E-mail:zxd711020@hotmail.com gbstandard@hotmail.com chinastandard@hotmail.com ; QQ: |
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咨询: CB/Z 121-1998 舰艇用921A等钢板缺陷补焊技术要求 Technical requirements of repair welding for defects on the 921A etc.steel plates used in naval ships 电话:010-88099016 ; E-mail:zxd711020@hotmail.com gbstandard@hotmail.com chinastandard@hotmail.com ; QQ: |
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