增加出水管阻力以减低流量，检查泵吸水管内阻力，检查底阀减小吸水高度。
Add the resistance in the outlet to lower the capacity. Check the resistance in the suction pipe of pump. Check the bottom valve and lower the high of suction position.
增加出水管阻力以减低流量，检查泵吸水管内阻力，检查底阀减小吸水高度。
Add the resistance in the outlet to lower the capacity. Check the resistance in the suction pipe of pump. Check the bottom valve and lower the high of suction position.
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