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1. The length, diameter and using time of mandril are needed in the process of manufacturing the pipe.

2. Top effort, mandril should have sufficient strength, should head out of uniform, mandrel not served as core.

3. Results Pyrethroid residue in mandril increased by 400% and porosity reduced by 45% after heating electrothermal vaporizing liquid.

4. The wood flour mandril can be continuously used for a long time (1000h) without blockage, is adaptable to automatic production line and has high qualification rate.

5. The mandril connecting structure is arranged on the jetting joint of the air bottle nozzle.

6. The axial stress on the steel tube which appears on the contact region of the steel tube and mandril is larger than the radial and circumferential stress.

7. Scanning Electronic Microscope(SEM)and EDAX were used to analyze the surface defect of mandril for hot rolling steel tube. Appearance and growth of the surface defect were investigated and discussed.

8. The air discharging tool of the air bottle consists of the valve core mandril matched with the jetting joint and the connecting structure arranged on the valve core mandril.

9. In the design of aeroelastic model of long-span concrete-filled steel tube arch bridge(http://Sentencedict.com), the method of using an equivalent mandril to simulate the stiffness of whole arch rib is mainly used at present.

10. Compared with the prior art, the invention causes no pollution to the production environment, has high mandril strength and even volatility.

11. Specially design co-extruding die, merely need to replace core mandril , it may produce solid-wall pipe, solid wall inner helix pipe foamed pipe and foam inner helix pipe.

12. In the first part , it is mainly introduced the function which the mandril detection system should have, the theory of detecting , constitutes and work process of the system.

13. In the present study, we design an automatic remote control system, which is used to push the mandril out of large rocket engine.

14. The substitution pneumatic centering roller with hydraulic centering roller, increases the clasp force of the centering roller, and improves the stability of the mandril.

15. Obiective Test the relationship between the heating time of electrothermal vaporizing liquid and the residues of pyrethroid in mandril.

16. Established in 1995. U. S. products from raw materials Mandril plating and heat treatment process to adopt a consistent approach to provide services to customers.

17. It give out an efficient method of saw band machine tensile system lag determination through the analysis of time lag state equation on high elasticity mandril model saw band machine tensile system.