For the actuators with pneumatic diaphragms or air cylinders the matching flame-prooftype electric-gas valve positioner shall be provided together with the valve.
执行机构采用气动薄膜或气缸执行机构的，随阀提供配套隔爆型电？气阀门定位器。
2
There are two types of explosion-proof instruments, safety type and flame-prooftype, which constitute intrinsic safety control system and flame-proof control system respectively.
关于防爆有“本安”和“隔爆”类仪表，它们分别构成“本安控制系统”和“隔爆系统”。
3
A new type of flame retarding mildew-resistant and water-proof tarpaulin for railway use was developed.