21. A improved cone - shaped model is given in order to improve the old cone - shaped model 22. Cone - shaped bayonet ring couplings for rolling stock part 11 : intubatton straight couplings23. Cone - shaped bayonet ring couplings for rolling stock part 13 : meter - pipe straight couplings24. Cone - shaped bayonet ring couplings for rolling stock part 15 : cone thread straight couplings25. Deformation observation of the non - survey - marked cone - shaped high object with forward intersection method 26. Cone - shaped bayonet ring couplings for rolling stock part 17 : columned thread straight couplings27. Cone - shaped bayonet ring couplings for rolling stock part 20 : cone thread angle coupling bodies28. Cone - shaped bayonet ring couplings for rolling stock part 10 : reducing straight coupling bodies29. Cone - shaped bayonet ring couplings for rolling stock part 14 : meter - pipe straight coupling bodies30. Cone - shaped bayonet ring couplings for rolling stock part 12 : intubatton straight coupling bodies
