小软管：可弯曲的圆柱形小容器，一头密封，另一头带螺旋盖，用于装入颜料、牙膏等膏状物质。

A small, flexible cylindrical container sealed at one end and having a screw cap at the other, for pigments, toothpaste, or other pastelike substances.

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本文以确保螺旋体法兰密封面的密封性能为前提，讨论了一种用以确定可拆螺旋板式换热器大平盖螺栓预紧力的估算方法。

This paper is based on the sealing reliability of flange for the DSHE and submits a predicting calculation' s method of the bolt for seating gasket used in circular-shaped cover of the DSHE.

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