免费观看全黄做爰大片_奇米狠狠一区二区三区_夫妇交换系列小说h_腿粗屁股大的丰满老女人

Our 3ZB-50/7 three-cylinder piston pump produced by our company is listed as Shaanxi Province's 2006 Torch Program by Shaanxi Science and Technology Department. The project number is 2006HJ-57.

The project is mainly used for oil field water supply, water injection. have:

1, large displacement, multi-functional;

2, a variety of plunger specifications conversion structure;

3, the overall cylinder head, straight-through valve group structure;

4, power side, the hydraulic side without positioning structure;

5, configuration self-priming device;

6, interlock device, automatic alarm, protection system.