|Gross vehicle mass
||Gross Vehicle Mass of a goods-carrying, commercial vehicle is the sum of its tare mass, and the mass of goods the vehicle can safely carry, in accordance with its design specifications.
|Hardening & tempering
||By heating and then swiftly cooling certain kinds of steel changes the way that the elements in the alloy are arranged, resulting in a harder material.
||When carbon and other materials are alloyed with iron it forms steel. The amount of carbon used can be changed effecting hardness and toughness.
||Bitumen is a highly viscous, black, sticky, organic liquid primarily used as a binding agent for paving roads.
|Vacuum||A vacuum or partial vacuum is the term used to describe a volume of gas with a pressure lower than atmospheric pressure. A vacuum can be created by enlarging the space containing the gas or reducing the volume of the gas in a fixed container.|