In automatic ____ the winch may be overhauled and wire is paid off the barrel at a pre-det

When there is a flame failure in an automatically fired auxiliary boiler, the _____.

Worm geared automatic mooring winches are ____ as the multi－start feature reduces the adva

An emergency diesel generator should automatically shut down in the event of ___________.A

In America, the traditional time for graduations is in______.A．May.B．September.C．May and J

Unemployment insurance serves as the economys automatic stabilizer in that it______.A．prov

The teacher ______ be in the office; maybe he is in the library.A、mightB、couldC、may notD