Dolphins are known to make three types of sounds: whistles, clicks and burst pulses.
大家知道海豚可以制造三种声音：哨声、咔嚓声和促发脉冲声。
Advantages and disadvantages of CNG3 and CNG4 types are mentioned. The FRP vessel with different design and burst pressures are obtained by manufacturing technique and filament winding theory.
文中比较了第三代CNG (CNG3)和第四代cng (CNG4)气瓶的优缺点，通过缠绕理论和制造技术得到不同设计和爆炸压力的纤维增强塑料气瓶。
Objective To compare the clinical treatment of four types of anterior fixation system on the thoracolumbar spinal burst fracture.
目的比较四种前路内固定器械治疗胸腰段脊柱爆裂性骨折的临床效果。
Objective To compare the clinical treatment of four types of anterior fixation system on the thoracolumbar spinal burst fracture.
目的比较四种前路内固定器械治疗胸腰段脊柱爆裂性骨折的临床效果。
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