Technical supply co., Scranton. [from old catalog] · Scranton, Pa., Technical supply co · leaf 161
^THE NEW MODEL POCKET ROTAMETER … 1375 Registering 100 Feet, With Instantaneous Set Back to Zero The great success of the Rotameter in determining beforehand the timerequired for machining a piece of work in a lathe or boring mill by ascer-taining the number of revolutions per minute and also the feed per revolutionhas led to a…
Engineering instruments · Drawing instruments
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