"Jincheng 18" shield machine passed acceptance

On August 9th, China Railway Sixth Bureau Group, China Railway First Hospital Group and China Railway Construction Heavy Industry Group passed the inspection and acceptance of “Jincheng No.18” shield machine built by Rail Construction Heavy Industry Group for Lanzhou Rail Transit Line 2

Various flow meter principle introduction

A differential pressure flowmeter 1, orifice flowmeter (standard orifice, nozzle) 1) Principle Filled with fluids, when they flow through the orifices in the tubes, the flow bundles will form a local contraction at the orifices, so that the flow rate increases, the static pressure is low, so th

Decoration plate can be such a province

For home improvement, many homeowners are ignorant. Most owners buy plates to go back and do furniture. They will follow the recommendations of woodworking masters to buy a certain number of plates. Even so, many of the owners who have been renovated will certainly know that there will be material l

How to apply wax fertilizer to winter crops reasonably

Winter crops usually include wheat, rape, green manure, and castor. How do winter crops rationally apply wax fertilizer? 1, according to crop growth and leaf color application. Shi wax fertilizer can not engage in "one size fits all", depends on the growth of winter crops and