For the main pressure-bearing parts of equipment in categories II, III and IV, this must take the form of a certificate of specific product control.
即二类,三类,四类的压力容器中的主承压部件,必须经过特定的产品控制型式,然后获得相关的证书。
For the main pressure-bearing parts of equipment in categories II, III and IV, this must take the form of a certificate of specific product control.
即二类,三类,四类的压力容器中的主承压部件,必须经过特定的产品控制型式,然后获得相关的证书。
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