Electrical and scientific instruments and apparatus : november 20th, 1899 (1899)
Elmer G. Willyoung & Co · New York : E.G. Willyoung · leaf 142
his means under orover, behind or in front of a patient and at any desired angle. The holderfor the tube is cork lined and the joints are universal so that the tube needmerely be twisted to its proper position and one screw tightened to set thewhole finally. The connecting wires are carried by our…
Electric apparatus and appliances · Equipment and supplies
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