The degree of tightness should be properly packed, not pressure tight, nor too loose, with fluid leaking drop by drop to prevail.
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not pressure tight
不紧压
以上为机器翻译结果，长、整句建议使用 人工翻译 。
He finds that, taken together, these special factors are enough to explain why the increase in wage pressure due to tight labour markets has not fed through to prices.
ECONOMIST: Economics focus
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