Welch Lab Machine
mfg. by WM Welch Scientific Company Chicago, Ill. General Electric motor w/variable speed, forward and reverse and revolution counter, not sure what this was used […]
2954 total views, 2 today
mfg. by WM Welch Scientific Company Chicago, Ill. General Electric motor w/variable speed, forward and reverse and revolution counter, not sure what this was used […]
2954 total views, 2 today