This machinery insurance-type role to ensure that the delayed action only in the lock chamber when the pressure dropped to a certain value.
这种机械保险式的延迟作用能确保开锁动作只有在膛压下降到一定数值时才发生。
This machinery insurance-type role to ensure that the delayed action only in the lock chamber when the pressure dropped to a certain value.
这种机械保险式的延迟作用能确保开锁动作只有在膛压下降到一定数值时才发生。
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