The upper sleeve is connected with the lower sleeve via a threaded tube.

上套 管和下套管通过螺纹管连接在一起。

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The end section of the lower sleeve is the outlet of the air, liquid mixing fluid.

下套管末段为气液混合流体出口。

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Sliding steel sleeve at the lower end of rubber barrel is used to make reasonable force arrangement for downhole packer meanwhile the expandable pressure of rubber barrel is decreased.

胶筒下部钢套采用滑套式，在降低胶筒扩张压力的同时，使封隔器在井下受力更合理。

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We knew way back at CES that Qualcomm had a few lower-end chips up its sleeve, but now it's official: the Snapdragon 400 and 200 have been formally detailed in a company blog post thrown up today.

ENGADGET: Qualcomm formally details lower-end Snapdragon 400 and 200 processors

My real hand on the lower level and above it a fake rubber hand, arranged so it appeared to extend out of the sleeve of my own suit.

BBC: David Gregory-Kumar: The rubber hand experiment