Small Bore 小缸径
small-bore jet 小孔喷注
deep-small bore 深小孔
small bore pipe 小管径
small bore tube 小径管
small-bore weapon 小口径武器
small-bore piston 小缸径活塞
small-bore bullet 小口径枪弹
ADJ (of a firearm) having a small bore, especially one of less than .22 calibre (枪)小口径的
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