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| English | Chinese |
| vapour pressure The partial pressure of water vapour in the atmosphere. For a liquid or solid, the pressure of the vapour in equilibrium with the liquid or solid | 蒸气压 (大气层中水蒸汽的部分压，对于液体或固体，指与液体或固体均衡的蒸汽压。) |
| vapour pressure | 蒸气压力 |
| vapour recovery system Gas feedback device: while refuelling gasoline vapors are sucked off and led back again into the storage tank | 油气回收系统 (油气反馈装置：汽油加油时，油气被吸入关闭和被导回进入储罐。) |