Sealing coring tools mainly consists of external threaded adapter, balance piston, limit joint, inner and outer barrel, core catcher, locating pin, sealing head and coring bit.

密闭取心工具主要由外螺纹接头、平衡活塞、限位接头、内外筒、卡箍岩心爪、定位销、密封头、及取心钻头等部件组成。

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Threadless anti-impact smooth sections can be arranged on the outer ends of the threaded sections of both ends of the steel barrel.

可在钢桶的两端的螺纹段外侧设置着无螺纹的抗冲击光面段。

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The ban will also apply to any semi-automatic handgun with a fixed magazine with a capacity to accept more than 10 rounds or a threaded barrel.

FORBES: Senator Feinstein's All-Out Assault On Gun Rights

Consider his proposal for a new "assault weapons" ban, targeting a class of weapons distinguished by their cosmetic features, such as a pistol grip or threaded barrel.

WSJ: David Rivkin and Andrew Grossman: Gun Control and the Constitution

Under the 1994 law, these included semi-automatic versions of rifles that accepted detachable magazines and possessed at least two other characteristics, such as a protruding pistol grip, flash suppressor (or a threaded barrel to accept one), or a folding or telescoping stock.

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