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water valve
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water valve
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风系统和水系统
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water valve
水阀
水系统中调节水流量和水流动方向的装置。具有节流、导流、截止、止回、分流或溢流卸压等功能。
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ice crust injury of wheat
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IceCube Neutrino Observatory
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ice floods in China
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Ice Hockey
ice hockey of Winter Deaflympics
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