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。

youdao

In addition, upper extreme of the pump body is permanently provided with a hanging ring device; bottoms of the pump end shell cover and of the back cover are provided with adsorption devices.

另外在泵体上端固定有提手装置，且在泵端盖、后盖的底部设置有吸附装置。

youdao

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。

youdao

They told me that they were not allowed to use the hand pump to get water as it belonged to upper caste people.

BBC: Flood victims face caste discrimination