smooth bore

同根派生

Design Features and Comprehensive Parameters of Muzzle Brake of High-bore-pressure smooth bore Gun.
高膛压滑膛炮炮口制退器的设计特点及性能评价指标
A rifled musket unit isn’t going to be available unless you research all the right elements that make mass produced rifled barrels (as opposed to smooth bore muskets) possible.
阿凸滑膛枪单位是不会有，除非您研究的所有权利的内容，使大规模生产螺纹桶（而不是顺利口径步枪）可能的。
Today's diamonds are more likely to embed, not fracture, into the bond and increase the smooth bearing surface of the blade.
今天的钻石更容易嵌入,不断裂,入关键表面光滑,增加叶片。
Our torpedo boats bore down on the enemy cruiser.
我方面鱼雷艇向敌巡洋舰冲去。
It took him long time to smooth away perplexities.
他花了好长时间才消除了困惑。