1. Species are natural rubber styrene-butadiene rubber nitrile rubber chloroprene rubber isobutyl rubber polyurethane rubber fluorine rubber and so on. 品种有天然橡胶、丁苯橡胶、丁腈橡胶、氯丁橡胶、异丁橡胶、聚氨酯橡胶、氟橡胶等。
2. Species are natural rubber styrene-butadiene rubber nitrile rubber chloroprene rubber isobutyl rubber polyurethane rubber fluorine rubber and so on. 品种有天然橡胶、丁苯橡胶、丁腈橡胶、氯丁橡胶、异丁橡胶、聚氨酯橡胶、氟橡胶等。
3. Species are natural rubber styrene-butadiene rubber nitrile rubber chloroprene rubber isobutyl rubber polyurethane rubber fluorine rubber and so on. 品种有天然橡胶、丁苯橡胶、丁腈橡胶、氯丁橡胶、异丁橡胶、聚氨酯橡胶、氟橡胶等。
4. The deformation characteristics of the cross member pipe have been analyzed with determination of necking numbers and necking force. 分析了前横梁管材缩口的变形特点，确定了缩口次数和缩口力。
5. Mandrel-less roller is produced by necking spinning process in reversed direction. The shaft neck is shaped by necking spinning the ends of thin-wall steel tube. 整体式无心轴托辊的成形方法采用反旋缩径旋压，是将薄壁钢管两端直接旋缩成轴颈得到的。
