First, cleaning up a forest after a fire or storm does not necessarily create the right conditions for tree growth.
首先，在大火或者暴风雨之后的清理并不一定会给树的生长提供合适的生长环境。
Industrial boosting: process water system, cleaning system, high pressure washing system, fire system.
工业增压：流程水系统、清洗系统、高压冲洗系统、消防系统。
The suitable time to clean oil tank and the safety problems such as oil gas poisoning, fire-explosion and tank deformation during cleaning operation are introduced.
介绍了油罐清洗作业中存在的油气中毒、火灾爆炸和罐体变形等安全问题，并针对问题提出了解决办法。
The vacuum technology used in the army, oil depot in the fields, e. g receiving, storage, dispatch, means of fire fighting, replacement of the waste oil and the cleaning of the oil tank are int…
本文叙述军用油库在接收、贮存、发放石油产品、燃油消防、废油更生及油桶清洗等范围采用真空的情况。
The smoke of one small fire causes no harm to the environment. Natural cleaning processes can clean the particles of smoke from the air.
小火带来的烟不会危害环境，因为自然净化作用会将空气中的烟尘清除。
CO2 can be used in many fields, such as food, welding, fire fighting, agriculture, development of oil and gas, cleaning, chemical engineering and so on.
CO2可应用于食品、焊接、消防、农业、油气开采、清洗、化工生产等许多行业。
The dangerous factors in cleaning process are analyzed, and control measures for fire accident are given.
分析了清罐作业中存在的危险因素，提出了清罐作业中预防事故发生的防范措施。
Using the method of fire and explosion indexes, a safety assessment is made of the production device in a gas-cleaning plant.
采用火灾爆炸指数法对天然气净化厂生产装置进行了安全评估。
Using the method of fire and explosion indexes, a safety assessment is made of the production device in a gas-cleaning plant.
采用火灾爆炸指数法对天然气净化厂生产装置进行了安全评估。
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