ORIGINAL PATENT APPLICATION NUMBER 720,600 FOR IMPROVEMENTS IN HOLLOW BLADES FOR THE AERODYNAMIC ROTORS OF HELICOPTERS AND WIND MOTORS. (HERTFORDSHIRE AND MIDDLESEX).
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Book Details
PublisherHMSO
ISBN / ASINB00407TDMU
ISBN-13978B00407TDM1
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸