bare pipe-line 裸管路 ; 露外管线
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。
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