aging process
asphalt
clamp
clay
composition
construction industry
construction site
corner
development
dirt
drinking water
earthwork
engineer
engineering
environmental issues
examining
industrial background
industry
large
men
mud
nature
occupation
place of work
potable water
professional occupation
prop
reflective clothing
repairing
reservoir
rusty
savings
screw
serious
shovel
small
social issues
stainless steel
steel
sticks
storage tank
street
suburbs
sunlight
sustainable resources
symbol
town
trench
tube
valve
warming
warning sign
water
water crisis
water meter
water pipeline
water pump
water scarcity
water supply system
wet
working
world crisis
定額
Maintenance of the drinking water supply system for the suburbs. Replacement of a non-functional valve with new gate valves, 300 mm flange diameter.の素材 [FY310165954458]
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