双向灯泡贯流式水轮水泵机组
double-acting light bulb tubular turbine and water pump set
水泵皮带调整
water pump belt adjustment
水泵皮带张紧装置
water pump belt tightener
水泵水轮机全特性
complete characteristic curves of pump turbine
弹簧加载风扇皮带张紧轮
spring loaded fan belt tightener pulley
风扇带轮调整支架
fan pulley adjusting bracket