| Subject | English | French |
| mater.sc., mech.eng. | blow off | chasser |
| mater.sc., mech.eng. | blow off | purger |
| mater.sc., mech.eng. | blow off | faire écouler |
| mater.sc., mech.eng. | blow off | évacuer |
| cycl. | blow off | déjanter |
| mater.sc., mech.eng. | blow off | vider |
| mater.sc., mech.eng. | blow off | aérer |
| transp. | blow off cock | robinet de vidange |
| transp. | blow off cock | robinet de purge |
| transp. | blow off cock | robinet d'évacuation |
| mech.eng. | to blow off steam | laisser échapper la vapeur |
| mech.eng. | to blow off steam | faire tomber la vapeur |
| mech.eng. | blow off tube | tube de vidange |
| mech.eng. | blow off tube | tube de purge |
| mech.eng. | blow off tube | tube d'évacuation |
| tech., mech.eng. | blow torch cutting-off machine | machine à découper au chalumeau |
| vent. | blowing off | soufflage |
| met. | blowing off a boiler | vidange d'une chaudière |
| gen. | blowing-off | décharge de la pression |
| nat.res. | blowing-off | vidange |
| mech.eng. | blow-off cock | robinet purgeur |
| mech.eng. | blow-off cock | robinet de purge |
| transp. | blow-off noise | bruit de décharge |
| earth.sc., el. | blow-off of flame | soufflage de la flamme |
| mech.eng. | blow-off pipe | tuyauterie de purge |
| chem., el. | blow-off pot | pot de sécurité |
| health. | blow-off silencer | silencieux d'échappement |
| lab.law., mech.eng. | blow-off valve | soupape de décharge |
| lab.law., mech.eng. | blow-off valve | soupape d'échappement |
| tech., industr., construct. | blow-off valve | valve d'échappement |
| transp. | blow-off water from boiler | eau de purge de la chaudière |
| coal. | blow-off zone | zone de soufflage |
| transp., mech.eng. | compressor blow off | système de décharge du compresseur |
| construct. | emergency blowing off | sortie de réserve |
| construct. | emergency blowing off | déversoir de sécurité |
| coal. | fines blowing off belt | soufflage des fines hors de la courroie |
| construct. | pipeline blowing-off | soufflage de la conduite |
| gen. | the explosion blew his arm off | il a eu le bras emporté par l'explosion |
| gen. | the wind blew him off balance | le vent l'a déséquilibré |