| 1. | Normal, double-helix dna is spiral, like a loosely coiled spring .
正常的双螺旋DNA是螺旋形的，像一根松松地卷曲的弹簧。
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| 2. | Specifications for double coil spring washers for aircraft
航空用双盘簧垫圈规范
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| 3. | Single coil spring washers . small serie . symbol wz
单圈盘簧垫圈.小型系列. w2符号
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| 4. | Single coil spring washers . standard serie . symbol w
单圈盘簧垫圈.标准系列.符号w
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| 5. | Single coil spring washers . strong serie . symbol wl
单圈盘簧垫圈.大型系列.符号wl
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| 6. | Small cylindrically coiled springs - specification
小型圆柱螺旋弹簧技术条件
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| 7. | Shipbuilding - coiled springs for marine machinery
造船.船舶机械用螺旋弹簧
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| 8. | Small cylindrically coiled springs specification
小型圆柱螺旋弹簧技术条件
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| 9. | Hexagon head bolt and single coil spring lock washer assemblies
六角头螺栓和弹簧垫圈组合件
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| 10. | Coil spring loaded slotted oil control ring
螺旋弹簧加载双坡口油环
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