对于特殊的设计类型，至少一个产品的的每一个型号的防空设备都需要流量测试。

For a specific design type, at least one production venting device of every size shall be flow tested.

youdao

由于大量的电话型号，已经建立是不可能的测试也都不同类型。

Due to the huge number of Phone models that have been created it is impossible too test every different type.

youdao

由于大量的电话型号，已经建立是不可能的测试也都不同类型。

Due to the huge number of Phone models that have been created it is impossible too test every different type.

youdao