Bridge orders must be _____ and a record of any required changes in speed and direction sh

When the order _____ is received from the bridge, the main air stop valve in the starting air line should be shut.

The police were given an order that the stolen documents must be recovered at all_________

During repair, lubrication lines and orifices must be _____.A.taken awayB.engagedC.connect

Care must be taken to condition the ______ in the boiler to prevent scaling, and corrosion

The soda－acid portable extinguishers must be discharged and refilled _____.A.every six mon

For there ______ successful communication, there must be attentiveness and involvement in