Aluminum alloy luggage accessories can free expansion is well known, it is how to implement a key expansion? Actually not difficult, alloy luggage accessories hands with spring inside control according to the system of press and return, and promote iron pipe inside the wire control tube joints on the fitting of a spring bead pop-up contraction, so as to achieve control equipment accessories elongation shrinkage size. The above for the internal structure of two equipment accessories, if three or more section aluminum alloy luggage accessories, between pipe and fill in the same size fittings to control the elongation shrinkage, but don't need wire, as long as the tube part of the whereabouts to the aluminum alloy fittings can control scale equipment accessories. The above content by equipment accessories, luggage accessories co. , LTD. , bags accessories manufacturers share, luggage accessories main products: bags luggage accessories, speaker bag accessories, kit bags accessories, cosmetic box luggage accessories, folded trolleys, support processing custom wholesale service, luggage accessories is source factory, price concessions at the same time, the quality is guaranteed! If you need to learn more about equipment accessories information with product knowledge, welcome to login luggage accessories website consultation understand! — — Equipment accessories, luggage accessories co. , LTD. 11 years experience in equipment accessories research and development manufacturing custom hotline: 0769 - 83980113 13829269591 website: WWW. tianyu76。 Com email: gdqiangyi @ 163. Com address: luggage accessories, catalpa village bridge city changping town bridge industrial zone in bl1 building