The invention has the advantages of reasonable structure, advanced technology, bright and clean surface of the product, non-welding connection, etc.
本发明具有结构合理，工艺先进，产品光洁，无焊接 等优点。
Germany RBT import external thread needle valve can be equipped with stainless steel welded pipe, and pipeline butt welding connection, but also through the outer nut removing the valve.
品牌：进口外螺纹针型阀可配带不锈钢焊接管，能与管道直接对焊连接，也可通过外螺母拆卸阀门。
It makes comparative analysis about parts of GB150 welding connection classified standard and international standard. It also makes improvable Suggestions of pressure containers' testing criterion.
对GB150的部分焊接接头分类标准与国际标准进行了对比分析，提出了压力容器检验标准的改进建议。
It makes comparative analysis about parts of GB150 welding connection classified standard and international standard. It also makes improvable Suggestions of pressure containers' testing criterion.
对GB150的部分焊接接头分类标准与国际标准进行了对比分析，提出了压力容器检验标准的改进建议。
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