结论双J管具有内支架和内引流的双重作用，合理应用可减少术后并发症的发生。
Conclusion the double Jtubes had the dual functions of internal stent and internal drainage. The reasonable application may reduce the complications.
本文介绍了用于研究平面运动激波与头激波迎面相互作用的电控双驱动激波管技术。
A technique of electrically controlled double driver shock tube for studying head-on interaction between a moving plane shock and a bow shock has been developed.
通过混合培养和血清管实验研究了双歧杆菌体外对沙门氏菌的生长调节作用。
Regulation of Bifidobacterium on growth of Salmonella is studied in vitro by co-culture and serum tube experiments.
现利用双剪强度理论计算火炮身管的强度，考虑了材料的拉压异性影响和轴向应力的作用，计算结果更为可信。
The twin shear strength theory to compute the strength of gun barrels is used. The effect of strength-difference and axial stress are considered. The calculating result is more convinced.
现利用双剪强度理论计算火炮身管的强度，考虑了材料的拉压异性影响和轴向应力的作用，计算结果更为可信。
The twin shear strength theory to compute the strength of gun barrels is used. The effect of strength-difference and axial stress are considered. The calculating result is more convinced.
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