The travelling valve of the pump is designed to be closed and opened forcibly, and the pump plunger adopts equal-diameter bare pipe with a floating structure to prevent gas lock and sand sticking.
这种抽油泵柱塞游动阀采用机械强制开启和关闭的结构,柱塞为等径光管、浮动结构,可防止发生气锁游动阀、阀球关闭滞后、砂卡柱塞现象。
Cuiping finally realized her act and took the pipe and went out bare foot to the balcony.
倒是翠平猛然醒悟过来,拎着烟袋光着脚跑到阳台上。
Cuiping finally realized her act and took the pipe and went out bare foot to the balcony.
倒是翠平猛然醒悟过来,拎着烟袋光着脚跑到阳台上。
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