The motor mercury interruptor

The motor mercury interruptor admits control of the rate of make and break.

For a given gross weight a reduction in engine specific weight allows a corresponding increase in payload.

This allows (or permits) zero-setting the meter.

The bottom plunger moulding press allows for loading when the mould is in the open position.

This enables (or permits, or allows) the temperature to be found at any point.

This enables an easy replacement of the drum section.

The alloying elements make it possible to co-deposit substantial quantities of tungsten.

A central focusing screw makes possible the focusing of both barrels simultaneously.

Electric-motor drives permit efficient power generation...

The right-angle milling attachment permits (of) milling in the horizontal plane.

Aircraft model testing provides (or furnishes) a means for rapidly evaluating...

A laser-anemometer enables one to make two-dimensional velocity-component measurements optically.

This arrangement has enabled tooling costs to be reduced.

A multi-bender arrangement permits making a sequence of different-angle bends.

A modification of the square-jaw clutch permits more convenient engagement.

The first step lets us describe the dependence of...

These curves allow one (or us, etc.) to write...