Australiaâs tallest trees can be found in the south-west of Western Australia in the Valley of the Giants. Giant tuart, karri, and rich red jarrah which live for up to 500 years can be found here.
Feeler gauge set. A feeler gauge is a tool used to measure gap widths. Feeler gauges are mostly used in engineering to measure the clearance between two parts. They consist of a number of small lengths of steel of different thicknesses with measurements marked on each piece.
Barrels are air gauged to check bore diameter down the length of barrel. Basicaly the air gauge is a probe that has a known diameter piece on the end that has tiny holes drilled in it. Air is metered through these holes. When the probe is inserted into the barrel the amount of air that passes between the probe and the barrel is measured.