双面均凹进的；双凹的。
红血球呈现球状，而不是正常细胞的双凹圆盘状。
The red cells have a spherical rather than the biconcave-disk shape of the normal red cell.
在本文中，我们提出了双凹规划问题和更一般的广义凹规划问题。
In this paper, we put forward biconcave programming problem and generalized concave programming problem more generally.
碱性玄武岩的双凹型REE配分模式是熔体与单斜辉石、石榴石达到化学平衡或近于化学平衡的结果；
The double-concave shape of REE patterns of the alkali basalt show that the basalt melt had reached equilibrium or quasi-equilibrium with the garnet and clinopyroxene megacrysts.
他有轻度呼吸窘迫，双侧腮腺肿大，腹胀，可凹性水肿，杵状指。
He had mild respiratory distress, bilateral parotid enlargement, a distended abdomen, pitting oedema and digital clubbing.
南部陡坡带双河—赵凹—安棚一带是勘探大仓房组的有利地区。
The belt of Shuanghe-Zhaoao-Anpeng in the steep slope th the south is considered as a favourable area in Dacangfang formation.
用有限元方法，对双圆弧弧齿锥齿轮沿齿长方向齿根应力进行了计算。通过应力计算结果的分析，得出了凸、凹两齿侧应力沿齿长的分布规律。
Through the calculation of the finite element method(FEM) models for double circular arc profile spiral bevel gear, the stress changing pattern along the length of the tooth is obtained.
推导了进入双点啮合区的法面啮合角公式，采取了独特的剃齿刀修形方式，从设计和修形上下功夫杜绝剃齿中凹的产生。
And the normal engagement angle of approaching double-point tooth area is deduced. The special dressing method of shaving cutter has been adopted.
推导了进入双点啮合区的法面啮合角公式，采取了独特的剃齿刀修形方式，从设计和修形上下功夫杜绝剃齿中凹的产生。
And the normal engagement angle of approaching double-point tooth area is deduced. The special dressing method of shaving cutter has been adopted.
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