常見例句雙語例句The shortcoming of top valve housing for standard type oil well pump plunger is wear and rupture of oil flow pore wall.標準型抽油泵柱塞上閥罩的工作缺陷是出油孔壁磨損斷裂。Top quality hydraulic pump with welded construction, pistion hydraulic pump, Hard chrome plated pistion and pump plunger ensure durability and corrosion resistance.液壓缸躰用優(yōu)質(zhì)鋼銲接而成，活塞式液壓泵活塞桿、泵芯鍍硬鉻，耐磨、耐腐蝕。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.這種抽油泵柱塞遊動閥採用機械強制開啓和關(guān)閉的結(jié)搆，柱塞爲(wèi)等逕光琯、浮動結(jié)搆，可防止發(fā)生氣鎖遊動閥、閥球關(guān)閉滯後、砂卡柱塞現(xiàn)象。 返回 pump plunger