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STUDENT SPIRO METER
1. Cock for Draining off water strong construction.
2. Pulley Calibrated to denote volume inlet & outlet tubes.
3. Side cock for gases.
4. Complete with Corrugated tube mouth piece& recording lever.
5. Six litter Capacity for vital.
6. Used GAS meter with plastic/ chain tread compensated counter
Balance to the float balance to cut its MOVEMENT