In the light of the key technique of the down-hole driven progressive cavity pump (PCP) for oil production, a power distributional planetary reducer is proposed.
针对井下驱动螺杆泵的关键技术问题，提出了用于井下直接驱动螺杆泵的功率分流式行星减速器。
In the light of the frequent breaking of the rod string in a surface driven screw pump well, the force condition of the string in the well is analyzed by means of the elastoplasticity theory.
针对井口驱动螺杆泵抽油杆柱断脱频繁的问题，应用弹塑性理论分析了抽油杆柱在井中的受力状况。
The fire - foam -Gun for forest fire is an apparatus driven by a light pump which can change the water mixed with fire foam into foam for extinguishing fire directly and efficiently.
森林泡沫灭火枪是以轻型泵为动力，将森林泡沫剂与水混合后迅速变成泡沫。
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