在软基低堰掺气窄缝戽流消能研究基础上，提出一种新型消能工——孔板混合流消能工。
On the basis of studies on aeration tract bucket flow energy dissipation in lower weir on soft foundation, a new type of energy dissipater was put forward.
板基上下粘贴镀锌钢板，四周侧面采用黑色导电边条缝边。 实用是需要铺装其他表面材料。
Paste the galvanized steel base and down, around the side of a black conductive edge of the edge.
膨胀式防砂筛管由膨胀式割缝基管、相互重叠的金属滤网和膨胀式割缝保护套构成。
ESS consists of expandable slotted steel tube, overlapped metal screen and expandable slotted shroud.
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