Mechanical seals or stuffing boxes.

机械密封件，轴承，填料箱。

youdao

Many Afghans find it bizarre that the West should devote so much money to Mr Karzai, yet be unable to hold him to account over something so basic as stuffing ballot boxes on an industrial scale.

许多阿富汗人感到很奇怪：一方面西方国家给卡尔扎伊提供了大量的资金援助，但另一方面却又无法要求其承担基本的责任——如按照工业规模举行选举等。

youdao

The structure principle of stuffing-boxes of the AG-scrubber is presented. The causes of leakage of oil, water and gas are analyzed and the solving methods are raised.

介绍了环缝洗涤塔填料密封箱的构造原理，分析了渗漏油、水、煤气的原因及解决的办法。

youdao

Campaign committees for a number of presidential candidates have accused others of stuffing ballot boxes or throwing out votes.

VOA: standard.2009.09.08

Many Afghans find it bizarre that the West should devote so much money to Mr Karzai, yet be unable to hold him to account over something so basic as stuffing ballot boxes on an industrial scale.

ECONOMIST: The war in Afghanistan

Ballot box stuffing, replacing boxes, a vote count miscalculation are common violations that observers are ready to catch.

FORBES: While Moscow Sleeps, the Far East has Begun to Vote.

What is more, it almost certainly will scare off independent or opposition poll-watchers whose absence from polling stations will simplify stuffing of ballot boxes by the Sandinistas.

CENTERFORSECURITYPOLICY: Freedom Flame 2013