求翻译：孔板节流装置是标准节流件可不需标定直接依照国家标准生产1.国家标准GB2624-81;2.国际标准ISO51673.化工部标准GJ516-87-HK06。是什么意思？

Orifice device is a standard throttling without calibration directly produced in accordance with national standards national standards gb2624-81 3. Ministry of Chemical Industry on standard gj516-87-hk06.

orifice plate orifice unit is the standard orifice is directly without need of calibration standards in accordance with national standards GB production 1. 81 2624 - ISO international standards; 2.The 5167 provisions of international standards organization (ISO) unit of energy flow > Standard GJ

The orifice throttling gear is the standard reduces expenses to be possible not to have to demarcate defers to the national standards to produce 1. national standards GB2624-81< flow measurement throttling gear directly the design to install and to use >; 2. international standard ISO5167<

Orifice plate throttle device is not standard throttle calibration you want directly in accordance with the national standard 1. GB2624-81< national standard design and installation of flow measurement throttle devices and use >;2. international standards ISO5167< international organization

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