海量图书期刊资源,随时随地畅享阅读乐趣
The Supersonic Reflectoscope; an Instrument for Inspecting the Interior of Metal Parts by Means of Sound WavesFirestone, F. A.; Frederick, J. R. · The Journal of the Acoustical Society of America · 1944
Rubber coated electrodesR.H.O. · 1939
Transatlantic radio photosR.H.O. · 1939
NylonR.H.O. · 1939
Scientific knowledge of the pearlR.H.O. · 1939
Time and the growth of physicsR.H.O. · 1939
“Electrical thinker” solves mechanical problemsR.H.O. · 1945
Moisture and keeping quality in dehydrated vegetablesR.H.O. · 1945
A stadium with an air supported roofR.H.O. · 1945