Đồng hồ đo độ cứng InstruCon Barcol Impressor GYZJ-934-1-1
A variation of the 934-1 that has a "flat bottom" shaped support leg. This is used to sit on top of the crest of the round rung of a ladder such as a fire department ladder. Approved by the NFPA.
Original ASTM-648 Barber Coman Barcol Impressor GYZJ-934-1 Hand-held portable hardness tester manufactured by Barber-Colman. Official barcol impressor scale, for testing of Aluminum Alloys, Soft Metals, Plastics, Fiberglass Sheets, Tanks, Surfaces, Fire Department Ladders, Composite Materials, Rubber of Leather, Laminates, Lead. Beware of fake units.