因此，座板阀改进的意义更大。

Therefore, the base plate valve to improve more meaningful.

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另外座板上还设有靠背(8)。

In addition, a backrest (8) is also arranged on the seat plate.

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座板翻转：弹簧回复，也可做弹簧加阻尼慢回复机构。

Seat Flip: spring back, also can be slow return spring plus damper body.

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座板和支架之间设有减振垫；支棍一端或两端带有圆柱形橡胶头。

Said stick has cylindrical rubber head at one or both ends.

youdao

座板和支架之间设有减振垫；支棍一端或两端带有圆柱形橡胶头。

Said stick has cylindrical rubber head at one or both ends.

youdao