求翻译：中、小型弹簧，特别是螺旋拉伸弹簧，应当优先用经过强化处理的钢丝，铅浴等温冷拔钢丝和油淬火回火钢丝，具有较高的强度和良好表面质量，疲劳性能高于普通淬火回火钢丝，加工简单，工艺性好，质量稳定。是什么意思？

Medium and small springs, helical tension spring, should give priority to the enhanced treatment of steel wire, lead bath temperature and cold drawn steel wire and oil hardened and tempered wire with high strength and good surface quality and fatigue performance than ordinary quenching tempered stee

In the small spring, tension spring special is a spiral, and priority should be reinforced with a steel wire, lead-free processing of the isothermal cold bath oil hardened and tempered steel wire and steel wire, with a high strength and good surface quality, higher than the normal fatigue, hardened

Medium and small Springs, helical stretching springs in particular, should be given priority for intensive treatment of steel wire, patenting isothermal cold-drawn steel wire and oil-tempered wire, with high strength and good surface quality, better than normal quenching tempering on fatigue perform