A.the radio apparatus fitted on the portside B.the radio with a portable equipment C.the radio equipment which is easily movable D.the portable radio with some apparatus
A.bar securing a cargo port B.centerline vertical bulkhead C.deep beam D.spanner stay
A.a defective ignition system B.low lube oil level C.weak valve springs D.too heavy a load
A.radial B.sheath-screw C.gravity D.quadrantal
A.Safe working load B.Ship's working lift C.Starboard wing lift D.Stress，weight，load
