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Ang WJ-7 fastener ay isang uri ng hiwalay na walang balikat na fastener na ginagamit sa walang ballast track ng high-speed railway sa Tsina. Ito ay binubuo ng T-bolt, nut, flat washer, spring bar, insulating gauge block, iron cushion plate, underrail cushion plate, insulating buffer plate, heavy spring washer, flat washer block, anchoring bolt at embedded sleeve, atbp. Upang ayusin ang taas ng ri
Plain washer
Small resistance bar-spring clips
Cemented insulated fishtail plate
baseplate