... (We Sell): Springs, stampings, compression springs, extension springs, torsion springs, spring tine, spiral springs, wave springs, disc springs, mould springs, sofa springs, spring washers ,sofa springs, special-shape springs, trampoline springs, spring tooth ... : In House Number of Production Lines: 5 Number of R&D Staff: 5 - 10 People Number of QC Staff: 5 - 10 ...