当有必要把钢瓶供应压力降到较低的使用压力时，下文对于用于易燃、氧化剂、腐蚀性、惰性或毒性气体的压力调整器是可以适用的。
The following is applicable to pressure regulators used with flammable, oxidant, corrosive, inert, or toxic gases, when it is necessary to reduce cylinder supply pressure to a lower use pressure.
调整器的主要功能是，当钢瓶或过程管道内的高压气体从钢瓶流向设备时，把压力降到较低的可用的水平。
The primary function of a regulator is to reduce high-pressure gas in a cylinder or process line to a lower, usable level as it passes from the cylinder to a piece of equipment.
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