... drainage controller 疏水调节器 drainage cooler 疏水冷却器 drainage ditch 排水沟 ...
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plant drainage cooler 电厂疏水冷却器
In late Holocene, climate is dryer and cooler than that in middle Holocene, the precipitation of drainage area decreases. So runoff deceases, the width of riverbed becomes narrow.
进入全新世晚期，由于气候相对于全新世中期变得较为干燥，也较为温凉，流域来水减少，故流量减小，河床宽度变小。
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