mine drainage

Air pressure is the sum of the static pressure, dynamic pressure and pressure measurement of the dynamic pressure of wind pressure in mine. Pitot tube for general use in combination with a differential pressure gauges measure the dynamic pressure of wind load.
You search for products online, ask the manufacturer actually focused on natural wind pressure under wind pressure of or natural ventilation, this is fully use of natural wind, secure case design of the ventilation system. And measured wind speed is to detect whether the system can provide sufficient ventilation.

Think coal mine enterprise in quality assessment on security management and security standardisation work, if only on a my Shi (or units) for assessment evaluation, currently with passage of ” assessment standard is feasible ” total system; If on a different horizontal comparison evaluation units or my Shi, used by professional veiligheidsfactor ” ” ” ” evaluation and my security index evaluation by forms of nature is my evaluation assessment, security system type on object and all professional work of real level assessment made of evaluation results, both ordinary and bright at the same time to promote my company ” building intrinsic safety ” health development-mining.