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water conservancy machinery
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water conservancy machinery
Encyclopedia
工学
水利机械
释
water conservancy machinery
水利机械
广义上指水利工程建设中应用的各种机械,狭义上指以水利工程施工的使用、维护、管理为主要功用的各类通用机械和专用机械。
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ideal of a semigroup
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Ideal policy evaluation
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ideal refrigeration system
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