英文關鍵字
construction
crane
cargo
winch
hoist
rope
hook
clear
blue
sky
sites
buildings
structures
supporting
rotating
rise
lifting
lift
climb
ascent
up
elevating
ascensional
operation
exploitation
maintenance
running
working
progress
stroke
travel
process
motion
mechanism
machinery
gear
machine
arrangement
movement
technique
technology
engineering
technics
control
cabin
stroking
hoisting