1992 - Volume #16, Issue #1, Page #33
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Compressed Gas Tank For Valve Alarm
Anyone who's ever forgotten to turn off the valve on a compressed gas tank and later found that expensive gas had been wasted will be interested in this new 'Valve alarm" that clamps onto the valve on top of any compressed gas cylinder.
The "valve alarm" is secured by a wing nut and becomes an extension of the o..........


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1992 - Volume #16, Issue #1