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A coil spring is an open helical metal spring that offers resistance to a compressive force applied axially. Coil springs are usually coiled as a constant diameter cylinder. Typically compression springs, the most commonly used spring. The required load is reached by compressing the spring down to the matching...

plastic spacer Product Description:   Plastic space block for protective layer of reinforcing steel bar is designed according to the requirement of national steel concrete construal design norm   It is widely applied in the civil and industrial construction of buildings, roads, bridges, tunnels, airports, subway and so on. Product Character:   Having the advantages of high bearing capacity, self locking, crash-proof,...

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