Kind of measurement Net or gross calorific value, Wobbe index, Density and minimum airrequirement.
测量种类净热值或总热值，华白指数，密度，最少空气需要量。
2
To implement this clean airrequirement, the Act contains special permit provisions and requires changes in state implementation plans.
为实施清洁空气要求，该法案包含了许多特别许可条款并要求州对原来的实施计划做出调整。
3
Some problems exist during the operation of cartridge filter, such as little effect of blast cleaning, minor airrequirement and low filtering rate, etc.