Some cranes are mounted in pairs on a common platform which can be rotated through().
A、A.360°
B、B.270°
C、C.180°
D、D.90°
A、A.360°
B、B.270°
C、C.180°
D、D.90°
A、is the SWL of the crane B、are the SWL of the crane C、the SWL of the crane is D、the SWL of the crane are
A、is the S.W.L.of the crane B、are the S.W.L. of the crane C、the S.W.L. of the crane is D、the S.W.L. of the crane are
A、A.is the S.W.L. of the crane B、B.are the S.W.L. of the crane C、C.the S.W.L. of the crane is D、D.the S.W.L.of the crane are
A、A.The cranes may be operated independently B、B.The cranes may be interconnected for twin operation C、C.The cranes are powered by independent internal combustion power units D、D.All of the above
A、A. There are some saws in my toolbox. B、B. There are some pairs of pliers in my toolbox. C、C. There are some spanners in my toolbox. D、D. There are some tools in my toolbox.
A、Containers are loaded and discharged by gantry cranes. B、Cases are loaded and discharged by gantry cranes. C、Cases are loaded and discharged by heavy derricks. D、Containers are loaded and discharged by heavy derricks.
A、A.A centerline crane can never be operated in tandem B、B.One crane is able to work one end of two adjacent hatches C、C.These cranes are more economical and weigh less than outboard-mounted cranes D、D.One crane is able to work both sides of the ship
A、The cranes may be operated independently B、The cranes may be interconnected for twin operation C、When twinned,the crane rotation on the foundation assembly is unlimited D、All of the above