... imperfect drainagen.不完善排水,排水不良 Drainage of polder海涂排水 drainage facilities放泄设备泄水设备 ...
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drainage of polder district 圩区排水
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Calculating design drainage discharge have important significance for water safety and derating economic losses of waterlog in the polder areas.
圩区设计排涝流量计算，对圩区的水安全，有效减免涝灾经济损失有着重要意义。
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