| Subject | English | French |
| zool. | flapper skate | raie cendrée (Raja batis) |
| fish.farm. | flapper skate | pocheteau gris (Raja batis, raja macrorhynchus) |
| ichtyol. | flapper skate | raie à bec pointu (Raja oxyrinchus) |
| zool. | flapper skate | pocheteau gris (Raja batis) |
| ichtyol. | flapper skate | raie-capucin (Raja oxyrinchus) |
| ichtyol. | flapper skate | pocheteau noir (Raja oxyrinchus) |
| zool. | flapper skate | raie grise (Raja batis) |
| meas.inst. | flapper valve | soupape à charnière |
| earth.sc., mech.eng. | flapper valve | soupape à languette |
| automat., meas.inst. | flapper valve | soupape à clapet |
| earth.sc., mech.eng. | flapper valve | clapet fléchissant |