Increase the number of wheels and/or increase the tread width of the tires or tracks, so that their weight is distributed over a larger area.
liquids
By increasing the area of cross section in contact with the ground
To reduce the air resistance/drag acting against them and also to reduce the fuel consumption.
like deflectors on lorries
The collective nouns are a convoy of lorries a fleet of lorries.
The two lorries passed each other.He used to drive lorries for a living.
Larger and multiple tires and tracks keep the vehicles from sinking into the mud by reducing the pressure on the ground by spreading the weight of the vehicle over a larger area.
The word lorries is a common plural noun. It requires no apostrophe.The lorries lined up next to the curb.If the word lorries has a possession or belonging, it needs an apostrophe.The lorries' tires looked new.
how many eddiestobart lorries arethere
A pressure gauge simply measures and visibly indicates pressure in a system . It does not reduce the pressure. For that you need a PRV (pressure reduction valve ).
"Lorries" is a noun. It refers to a large vehicle used for transporting goods or materials.
The plural form is lorries. The plural possessive is lorries'.