To reverse the seat disc, unscrew the disc screw and disassemble the disc washer and disc rubber from the disc holder assembly.

为了翻转阀座阀瓣，则要拧松阀瓣螺丝，从阀瓣固定器总成拆解阀瓣垫圈和阀瓣橡胶。

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The structure and working principle of a screw tap holder is introduced, and the design calculation of its main parts is presented.

介绍了快换丝锥夹头的结构、工作原理和主要零件的设计计算。

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Step 1: Screw the bulb into the bulb holder .

步骤一：把灯泡栓入灯泡底座中。

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