Metric ton-force or ts T - is the gravitational metric unit of measurement of power equal to the force that acts on the body weight of one metric ton in a standard gravitational field.
A long ton-force - is a unit of gravitational force measurements in the American and British traditional system of measures, it is equal to the force that acts on the body mass of one long ton in a standard gravitational field.
Drop - Is off-system unit of volume measurement, which is equal to the amount of liquid that came off in the form of drops of a pipette or other device.