真空泵开始抽取电子枪管里的空气。
The vacuum pumps begin sucking the air from the barrel of gun.
他顺着枪管往另一端看。
公司精密制造，配有7.62毫米高精度枪管。
从枪管上的凹槽看过去，依然可以清晰直瞄准星。
The sight down the groove of the barrels was still perfect and still straight.
铁锈腐蚀了枪管。
建立了陶瓷镶套枪管设计理论并开发了通用设计程序。
The theory for gun tube design is established, and general program is worked out.
建立了陶瓷镶套枪管设计理论并开发了通用设计程序。
The theory for gun tube design is established, and general program is worked out.
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