angles arm danger dangerous electricity elevated elevation equipment external height heights high hydraulics lifting machinery on-high perspectives power power-lines power-pole raised raising repair-crew replace replacement replacing risks risky safety service trucks up-high vehicles work workman workmen boom buildings cambodia cap changing-a-globe city-street-light clouds crane heavy-duty hook light lighting mobile-crane open overhead public-utility risk sky steel-cables street-light telescopic-boom up-above wires wiring advice advising alert black communicate communication concern electric-power electrical electricity-power-lines energy high-voltage information informing power-supply protect protection sign strength supply warning yellow appropriate-behavior appropriate-behaviour care dangers deep deep-water denied depth direction don’t-alight flowers foliage not-allowed not-permitted permission-denied plants prohibited prohibition river riverside signs water wet white active activity bare bared-top canoe canoeing canoeist double-bladed paddle kayak kayaker kayaking leisure leisurely movement moving outdoor outdoor sports outdoors outside paddle paddle blades paddling pale pastime recreation sea sensitive skin sport sportsman sunburn transportation travel waves avoid be-careful careful caution communicating flammable gas gaseous natural-gas no-ignition outlet potential red stay-clear vapour vapours warned warning-sign accident broken damage damaged dangling overturned repairing repairs snapped snapped-off-pole-part surface surfaces trailer basket cherry-picker cleaning extension Harness insulators raised-platform safety-harness washing announcement beware color coloration colored colorful colors colour coloured colourful colours directions hiking Look looking lookout observant paths tracks walk walking walking-paths walking-tracks watch watch-out consumption faucet health listen rules tap undrinkable unhealthy