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1·When the correct figure is reached re-tighten the retaining screw.

达到正确数据后，重新拧紧螺旋栓。

2·Single cover retaining screw mounted on top of the indicator for easy access.

在流量指示器上安装一个盖子固定螺丝，便以打开进入。

3·Single cover retaining screw mounted on top of the flow switch for easy access.

在流量开关上安装一个盖子固定螺丝，便以打开进入。

4·The retaining screw is a weak part of the whole superstructure . The causes of the screw loosening and fracture are complex and difficult to control.

固位螺钉是整个种植义齿上部结构中比较薄弱的部分，其松动、折断的成因复杂且难以控制。

5·In the third part, the design rules for the pressure hull, the retaining ring, the connect screw thread of the truth-preserving canister are analyzed.

第三章分析了耐压壳体、支撑环和保真筒连接螺纹等耐压部件的设计准则。