最底的垫板，不需要弹簧保护装置。

Pads which bottom out, should not have spring pockets.

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弹簧铰链装置，开门角度适中；存取自如；

Spring hinge device, open angle medium; access freely;

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装置由钢套、水嘴、弹簧、定位销和活塞等组成。

The mechanism is comprised of steel sleeve, water nozzle, spring, positioning pin and piston.

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弹性装置可为弹簧、弹性橡胶等。

The elastic device can be a spring, an elastic rubber, etc.

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弹性装置可为弹簧、弹性橡胶等。

The elastic device can be a spring, an elastic rubber, etc.

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