細節
G. F. PALMER, London
A moving induction coil, with brass and composition fittings, on folding mahogany base with inset rule divided 0-50mm. -- 14in.(35.5cm.)long, closed
A moving induction coil, with brass and composition fittings, on folding mahogany base with inset rule divided 0-50mm. -- 14in.(35.5cm.)long, closed