อัปโหลดแล้ว 4 ปี ก่อนหน้านี้
WHAT IS RESPIRATOR?
Respirator is a device that provides protection against harmful air particles, fumes, mist, vapors, and gases.
Workers should wear these when working in a harmful environment.
There are several kinds of respirators available that provide protection against different kind of work hazards. https://mybreathbuddy.com/blogs/blog/frequently-asked-questions-about-respirator-mask
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