harmful substance造句怎么写

Ammonia is a poisonous and harmful substance that should be recovered during equipment maintenance so as to avoid it leaks out to pollute environment and hurt human.

The food items contained in the containers and packaging materials that are dirty or contaminated by pesticides, chemical fertilizers and other toxic and harmful substance;

The gas mask is characterized in that the gas mask can cover and seal the head and face of an operator without affecting normal operation, so that the operator can not be eroded by harmful substance.

Because the harmful material to human body, in the case of ventilation, a week's time to minimize the content of harmful substances.

exposure to or contact with harmful substance

Hydrogen sulfide in coke oven gas is a very harmful substance which must be cleared off.

"Incident" means an event involving the actual or probable discharge into the sea of a harmful substance, or effluents containing such a substance.

Vitrification is the safest disposal method at present. Howevee, some harmful substance volatilized from fly ash in melting process, which caused second contamination.

This product is a multi-function products, the effectiveness of a variety of brands, using this product, you can quickly and effectively remove harmful substance on the oil refined.

The invention discloses a transparent cigarette filter for adsorbing harmful substances in a cigarette.

The utility model provides a gas mask for operating personnel who works with harmful substance.

Wastes shall fall into three categories in accordance with factors such as toxicity, harmful substance content, impact upon the marine environment, etc.

Filter tips clean some harmful substance from the smoke.

the state of being contaminated with harmful substances.

Fabrics of China measure standard and foreign countries have greatly difference, form the regulation to products detection of harmful substance yet especially at present.