hat
◆ prensip Travay: diminye gaz la presyon ki wo nan gaz presyon mwayen an 0.6 ~ 0.9 MPA nan silenn lan, koule nan kapo pou respiratwa moun.
eng
◆ Working principle: reduce the high pressure gas to medium pressure gas into 0.6~0.9 Mpa in the cylinder,flow to hood for human respiratory.