Pump body seal part of the series for two sets of mechanical seals, mechanical seal, code-named the upper part 60b, the lower mechanical seal, code-named 60a.
泵体部分的轴封为两套串联的机械密封，上部机械密封代号为60b，下部机械密封代号为60a。
Rotation of one gear, the driver causes the second, or follower gear, to turn. The driving shaft is usually connected to the upper gear of the pump.
第一个齿轮即主动轮的回转引起第二个齿轮即从动轮的回转。驱动轴通常连接到泵上面的齿轮上。
ObjectiveTo investigate the effects of analgesic pump on respiratory function in 40 upper abdominally operated patients with chronic obstruction pulmonary diseases (COPD).
目的探讨术后使用镇痛泵对慢性阻塞性肺病患者上腹部手术后肺功能的影响。
An oil pump (18) is arranged on the external part of the casing of the gear box and on a power output shaft (17), and an oil cylinder (9) is arranged on the rear upper part of the gear box.
在变速箱的壳体外部，于动力输出轴(17)上装有油泵(18)，而油缸(9)被安放在变速箱的后上部。
Applying pump pressure then activates a sliding collar that opens access ports, enabling circulation across the upper casing interval.
然后施加泵压，使滑动箍启动，于是使进入口开启，从而能够穿过套管上段进行循环。
Maintenance difficulty is different, vertical pump maintenance is difficult, such as repair impeller should be the upper can all move to the rear;
维修难度不同 ，立式三螺杆泵检修难度大 ，如检修叶轮需将上部全部移去后方能进行 ；
The wellhead cable penetrator is a kind of device for penetrating the tubing hanger and upper flange to connect the electric submersible pump and surface power at the production wellhead of ESP.
井口电缆穿越器是电潜泵采油井口上用于贯穿油管挂和上法兰，并连接电潜泵和井上电源的一种装置。
The wellhead cable penetrator is a kind of device for penetrating the tubing hanger and upper flange to connect the electric submersible pump and surface power at the production wellhead of ESP.
井口电缆穿越器是电潜泵采油井口上用于贯穿油管挂和上法兰，并连接电潜泵和井上电源的一种装置。
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