Oil well pumps are downhole equipment for pumping oil. The liquid it sucks contains sand, wax, water, gas and corrosive substances, and it works underground at hundreds of meters to thousands of meters, and the internal pressure of the pump may be as hig
Company Information: We are a government-approved medical device manufacturer. We have a 100,000-level dust-free workshop and have all the production licenses and registration certificates required for mask production. Please rest assured to buy.
* PFE > 95%; BFE > 95%Three layers of purifying dust, toxic gases in the air, and skin-friendly filter cloth, giving you multiple protections, protects against dust, allergens and contaminants