【机械工程】半自动步枪

1994年，克林顿总统批准了一项攻击性武器（包括半自动步枪和大容量手枪弹盒）禁令，而此前一年他还批准了一项要求对枪支拥有人背景进行强制性调查的法案。

semi-automatic bevel gear tester with digital display

automatic, semi-automatic

semi-automatic hard gelatin capsule filling machine

Semi-automatic Biochemical Analyzer

new stream semi-automatic twin-tub washing machine

semi-automatic high-speed angular plunge cylindrical grinder

plungecut semi-automatic high-speed cylindrical grinder

Semi-automatic Biochemical Analyzer