![The Street railway journal . 4 ins.with a reasonable pressure. One very strongfeature of this device is that there are nostuffing boxes, the only moving joints beingthe piston heads and slide The Street railway journal . 4 ins.with a reasonable pressure. One very strongfeature of this device is that there are nostuffing boxes, the only moving joints beingthe piston heads and slide](https://c8.alamy.com/comp/2CH1DHR/the-street-railway-journal-4-inswith-a-reasonable-pressure-one-very-strongfeature-of-this-device-is-that-there-are-nostuffing-boxes-the-only-moving-joints-beingthe-piston-heads-and-slide-valves-as-now-made-there-are-no-keys-or-set-screws-to-workloose-reducing-valves-are-not-needed-withthis-device-the-shaft-on-which-the-pinionand-lever-are-placed-is-i-in-square-steel-withbearings-turned-down-upon-it-although-de-signed-primarily-for-use-on-corner-entrancefhich-have-the-door-sliding-back-in-the-side-of-the-car-of-course-be-adapted-to-cars-with-platform-gates-or-pneumatic-door-opene-2CH1DHR.jpg)
The Street railway journal . 4 ins.with a reasonable pressure. One very strongfeature of this device is that there are nostuffing boxes, the only moving joints beingthe piston heads and slide
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MB50 Pneumatic Folding Bus Door Pump for City Bus - China Bus Door, Bus Door Pump | Made-in-China.com
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