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A soft seat in the check valve will then assure a quiet closure.
止回阀的柔性阀座可使阀门安静地关闭。
youdao
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1 high strength soft hook, belt buckle cable clamp safety check.
高强度软吊钩，带安全卡扣止索夹。
youdao
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1 high strength soft hook, belt buckle cable clamp safety check.
高强度软吊钩，带安全卡扣止索夹。
youdao