背景：介入外科中所用的热封合器械常因加热过度导致封口炭化或漏血，效果欠佳。
BACKGROUND: Thermofusion device utilized in interventional surgery easily leads to sealing carbonization or blood leaking due to overheat.
合理选择结构可以有效地减少高低齿汽封的漏汽量，从而提高机组的经济性。
It could decreased leakage effectively by choosing the glands appropriately, so that the economy of steam turbine could be improved.
套管外封隔器可用于有高压气窜、恶性开漏等复杂情况井的固井，使固井质量有所提高。
The outer casing packer can be used in the troublesome Wells in which the high pressure gas channeling and the loss of circulation occur, to improve the cementing quality.
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