For different kinds of needs, the weir of small over-flow structure can be designed as the composite weir with two or more types.
小型过水建筑物的堰型，因各种原因需要，可分段设计成两种或两种以上的混合堰型。
For different kinds of needs, the weir of small over-flow structure can be designed as the composite weir with two or more types.
小型过水建筑物的堰型，因各种原因需要，可分段设计成两种或两种以上的混合堰型。
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