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Is the gas mask disposable? Gas masks are not disposable.You can change the filter box, filter cotton, etc.Gas mask is a special labor protection product for individuals,Also individual protective equipment,On the head,Protecting the breathing organs, eyes and faces of the people,Personal protective equipment to prevent damage to toxic substances such as poison gas, dust, bacteria, toxic and harmful gases or steam.Gas masks are widely used in petroleum, chemical, mining, metallurgy, military, fire fighting, disaster relief, health and epidemic prevention, science and technology, environmental protection, machinery manufacturing and other fields,And in cities where smog and photochemistry smoke are more serious, it can also play a more important role in the protection of personal respiratory systems.Gas masks can be divided into full masks and half masks from the shape,The full mask is divided into positive pressure and negative pressure.According to the principle of protection,It can be divid
What is the attention of the novice tank? Your Aquarium is best handled first,And some necessary equipment,Such as protein separator.1.First think about whether you like to watch the colorful tropical aquatic fish, and have enough time and spirit to raise and take care of them? don't raise them for a moment of pleasure, but only to the fish. unnecessary death, and spend a sum of money on the purchase of equipment.2.If there is no problem above and no family members oppose it, first see if there is enough space in the home to place fish tanks, set up the required lighting systems and filter equipment.3.You can go to the library or collect the required information on the website before deciding the size of the sea fish, fish tank and the required equipment and equipment you want to raise.At the same time of purchase, the filter equipment is best purchased with the fish tank.4.When you decide the sea fish you wa