reinforced concrete penstock
... hooped penstock 加箍式压力水管 reinforced concrete penstock 钢筋混凝土压力水管 semi-fixed penstock 半固定式压力水管 ...
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reinforced concrete pressure pipe
reinforced concrete sewer pipe 钢筋混凝土排水管 reinforced concrete pressure pipe 钢筋混凝土压力水管 reinforced concrete pipe 钢筋混凝土管 ; 钢筋水泥管 ..
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