Long anchor cable anchoring force

The anchoring force is related to the diameter of the borehole, the ratio of cement mortar and the thickness of the steel rope or steel strand. The reasonable combination of these factors can be obtained by orthogonal test design or .......

Use of low electromagnetic interference type micro-pump

For the use of DC brush motor micro-pump, micro-vacuum pump, pumping two pumping air, the motor interference problem is bound to exist. As the motor between the brush and commutator high-frequency conduction, disconnect, go back and forth, will produce a lot of clutter in the circuit. The a.......

Winter Persimmon Cultivation and Management Methods

First, persimmon tree planting 1. Choose a place to build a persimmon garden. It is advisable to choose a lee place with deep soil, loose soil and low groundwater level.

Dig hole base fertilizer. To follow the level of the mountain and build a horizontal terrace, a front hil.......