upper gun的意思|示意

31he came over to the gun rest and, thrusting a hand into Stephen's upper pocket, said.

31他来到炮座跟前，把手伸进斯蒂芬的胸兜，说。

In order to reduce the mass of a gun effectively, optimization design for the structure of the upper carriage of a gun was studied.

为了有效地减轻火炮质量，对某火炮上架进行了结构优化设计。

In the oil combustion, using top gun, the upper wind at a heat load of boiler blower gathered, part of the furnace temperature is high, reaching the ash melting point, resulting in boiler coking.

在投油稳燃时，运用上层油枪，使得上层一次风处热负荷会集，锅炉鼓风机部分炉温高，到达灰熔点，致使锅炉结焦。