The aim is maintain engineering machine's condition and minimumpollution to circumstance.
其目标是保持和恢复装备的规定状态和实现对环境影响最小。
2
The common point of the ventilation duct is to do the appropriate purification in the effective space, and it is the minimumpollution and the maximization of the space in this area.
通风管道说的通俗点，就是在有效空间做相应净化，是这个范围内的空间最小污染和最大化的清洁。
3
The site selection, design, operation program and engineering cost of hygienic landfill are described. The aim is to render the minimumpollution and even no pollution of landfill to the environment.