原文：
氧气减压阀的知识介绍： 　　1、在物理化学实验中，经常要用到氧气、氮气、氢气、氩气等气体。这些气体一般都是贮存在专用的高压气体钢瓶中。使用时通过减压阀使气体压力降至实验所需范围，再经过其它控制阀门细调，使气体输入使用系统。最常用的减压阀为氧气减压阀，简称氧气表。 　　2、氧气减压阀的工作原理： （ 氧气减压阀的外观及工作原理）。 氧气减压阀的高压腔与钢瓶连接，低压腔为气体出口，并通往使用系统。高压表的示值为钢瓶内贮存气体的压力。低压表的出口压力可由调节螺杆控制。使用时先打开钢瓶总开关，然后顺时针转动低压表压力调节螺杆，使其压缩主弹簧并传动薄膜、弹簧垫块和顶杆而将活门打开。这样进口的高压气体由高压室经节流减压后进入低压室，并经出口通往工作系统。转动调节螺杆，改变活门开启的高度，从而调节高压气体的通过量并达到所需的压力值。减压阀都装有安全阀。它是保护减压阀并使之安全使用的装置，也是减压阀出现故障的信号装置。如果由于活门垫、活门损坏或由于其它原因，导致出口压力自行上升并超过一定许可值时，安全阀会自动打开排气。

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译文：
Knowledge of the oxygen valve description: 1, the physical and chemical experiments, often use the oxygen, nitrogen, hydrogen, argon and other gases. These gases are generally stored in special high-pressure gas cylinders in the. Use the gas pressure through the relief valve down to test the required range, and then through the other control valve to fine-tune the gas input using the system. The most commonly used valve for the oxygen valve, referred to as oxygen table. 2, oxygen valve works: (oxygen valve appearance and principle). High-pressure oxygen chamber and the cylinder valve connection, low pressure chamber for the gas exports, and access to use the system. High table showing the value stored in the gas cylinder pressure. Low table by adjusting screw controls the outlet pressure. Cylinders used to open the main switch first, then turn it clockwise low pressure regulator screw table, to compress the main spring and transmission film, spring pads and mandrel open the trap door. This high-pressure gas imports from the hyperbaric chamber decompression by cutting into the low pressure chamber, and the exit leading to the working system. Turn adjustment screw to change the valve opening height, which regulate gas pressure to achieve the required throughput and the pressure value. Pressure Reducing Valves are equipped with safety valve. It is to protect the valve and make the safe use of the device, the signal is malfunctioning valve device. If, living mat, valve damage, or due to other reasons, leading to increased exports and more than a certain pressure on their own permission value, the safety valve will automatically open the exhaust.