The devices are usually an integral part of the cylinder rather than being installed in the cylinder valve. Some small acetylene cylinders, Type B or MC size cylinders, are equipped with fusible plugs in the valve body.

• 通常减压装置是钢瓶整体的一部分，而不是安装在钢瓶阀门上。一些小的乙炔钢瓶，B型或mc型钢瓶，在阀体里配备着易熔塞