Both the inner metal piece and the outer metal piece may include at least one tapered end.

所述内金属件与所述外金属件都可包括至少一个渐缩端或梯形端。

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A threaded neck ring is attached to the tapered end so that a protective cylinder cap can be installed.

锥状顶端装有带螺纹的颈环，可以安装保护性的钢瓶帽。

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A threaded neck ring is secured to the tapered end of the cylinder to allow a protective cylinder cap to be installed.

车有螺纹的颈环固定在钢瓶的锥形端，可以安装保护性瓶帽。

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But the sparks in this debate where really in the beginning, and it kind of tapered off toward the end.

NPR: Democratic Presidential Hopefuls Take on Las Vegas

Though support for the bill was strong at the start of voting, it tapered off at the end, and the nays carried the day.

FORBES: Magazine Article

But wind energy tapered off when a federal tax credit, due to expire at year's end, became a hostage of the presidential election.

NPR: US Economy Hamstrung By Washington's Brinksmanship