It is a sensitive instrument used to measure the change in distance between two gauge points on either side of the slot and consists of a frame with a handle on one end and a dial gauge of 0.002 mm x 10 mm travel fitted at the other end. The frame carries a fixed conical reference point on the handle side and a moving conical point on the dial gauge side. The plunger of the dial gauge rests against this movable point.
The equipment includes the following:-
Complete as above in a polished wooden box.
This is similar to HR72.325 except that it has a longer gauge length of 500 mm. The equipment comprises the following :-
Complete as above in a polished wooden box.
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