Paper introduces a technique of the normal four-wheel tractor equipped with exhaust gas controlling device and designs a computer safety monitor system.
论述了在普通四轮拖拉机上加装废气控制装置的技术，设计了一种相配套的计算机安全监测系统。
2
Hinder firearm to is it prevent flammable gas, liquid flame from spread and prevent flash back but cause safetydevice of explosion to used for.
阻火器是用来阻止易燃气体、液体的火焰的蔓延和防止回火而引起爆炸的安全装置。
3
In various regions, different test gases are usually necessary to insure the quality, safetydevice and thermal characteristics of wall hung gas boiler.