ORIGINAL PATENT APPLICATION NUMBER 581,327 FOR IMPROVEMENTS IN VARIABLE PITCH AIRSCREW CONTROL MECHANISM. (HERTFORDSHIRE). Buy on Amazon

ORIGINAL PATENT APPLICATION NUMBER 581,327 FOR IMPROVEMENTS IN VARIABLE PITCH AIRSCREW CONTROL MECHANISM. (HERTFORDSHIRE).

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Book Details
Publisher HMSO
ISBN / ASIN B0040LCCEC
ISBN-13 978B0040LCCE8
Marketplace India 🇮🇳
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