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To smash thru the enemy's trenches (in WW1), without being stopped by machineguns (a bullet proof infantryman).
they fought in the trenches ww1 was known as a war in the trenches
The Purpose of a Drainage Ditch was the bottom of the trenches where the soil turned very muddy. It held the muddy water, rubbish and occasionally excretement and stopped the soldiers from stepping on it with Duckboards.
Trenches in WWI extended about 400 miles.
It changed war in the trenches because
A Sump.
a hole you poo into and where they sleep
A duckboard
You would need a sump pump repair if the sump pump in your basement is not pumping out water. The purpose of a sump pump is to drain excess water that is part of your waterproofing system.
The sump is the oil reservoir. An oil pump lifts the oil from the sump and forces it under pressure through the engine. The oil then returns to the sump to be used again. Some sumps have fins on then - this acts as a cooler to help cool the oil in the sump.
drainage and duckboards :33<
drainage and duckboards :33<
drainage and duckboards :33<
they built trenches for procetion and they used it as a base.
To prevent compressed gas passing into the oil sump of the engine of an automobile.
"A sump is a low space that collects any often-undesirable liquids such as water or chemicals. A sump can also be an infiltration basin used to manage surface runoff water and recharge underground aquifers.One common example of a sump is the lowest point in a basement, into which water that seeps in from outside the house flows. If this is a regular problem, a sump pump that moves the water outside of the house may be used."--wikipedia
A dry sump is not submerged under water as a wet sump is. a dry sump uses a resivoir to hold the oil much like the brake fluid. a wet sump has the oil sump bolted to the bottom of the engine block :D