Abstract
Abstract : A map of countable CW-complex into a topological group is discussed regarding its homotopy-commutative properties. Proofs are offered for six theorems with correlaries and lemmas. ad-259 8779N6 AD-259 878Div. 26, 17, 1 (21 July 61) Ministry of AviaAD-259 878Div. 26, 17, 1 (21 July 61) Ministry of Aviation (Gt. Brit.). DEVELOPMENT OF TECHNIQUES FOR THE PRODUCTION OF AIRCRAFT FASTENERS IN TITANIUM ALLOY. Nov 60, 7p. illus. tables (S+T memo. no. 32/60) Unclassified report DESCRIPTORS: *Titanium alloys, *Bolts, *Nuts (Mechanics), Screw threads, Manufacturing meth ods, Production, Processing, Forging, Air frames, Mechanical properties, Tensile prop erties, Shear stresses. The substitution of Ti alloy for steel bolts in aircraft is attractive since by this means it is possible to effect considerable savings in weight. The various difficulties involved in the manufacture of Ti alloy fasteners are discussed and the properties which can be achieved with optimum manufacturing conditions outlined. (Author)
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