MACHINES OR ENGINES FOR LIQUIDS

**Definition:** This place covers:

Engines driven by liquids and machines for liquids, other than of positive-displacement type.

**Limiting references (this place does not cover):** - Machines for liquids and gases -> F01 - Positive-displacement engines for liquid -> F03C - Ocean thermal energy conversion (OTEC) -> F03G7/05 - Positive-displacement machines for liquids -> F04 - Rotary fluid gearing of the hydrokinetic type -> F16H41/00