Flight (3) Weights and measures (3) Vuelo (3) Pesos y medidas (3) Vol (3) Poids et mesures (3) vol (3) Pays-Bas (1) Implements (1) Instruments (1) Balances (Weighing instruments) (1) Water (1) Scales (Weighing instruments) (1) Levers (1) Hydraulic measurements (1) Hydraulic engineering (1) Gas-meters (1) Ability (1) Weight (1) Hidrometría (1) Balanzas (1) Ingeniería hidráulica (1) Eau (1) Compétence (1) Instruments (1) Poids (1) Compteurs à gaz (1) Leviers (1) Mesures (1) Génie hydraulique (1)