A safety clip or retainer must be installed to prevent attachments, such as chisels on a chipping hammer, from being unintentionally shot from the barrel.
必须安装保险夹或护圈，以防止配件(如气錾的凿刀)从凿筒中意外飞出。
A gun barrel was made of this new "chromium steel" but the first shot fired through it broke it into a dozen pieces.
用这种新的“铬钢”做成的枪，第一次开大后它就裂成了许多碎片。
A gun barrel was made of this new "chromium steel" but the first shot fired through it broke it into a dozen pieces.
用这种新的“铬钢”做成的枪，第一次开大后它就裂成了许多碎片。
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