1)  annular auger
环孔钻
2)  loophole
环孔
1.
Based on approximately hypothesis, a loophole p n junction current model is established in this paper.
在对环孔p n结作近似假设的基础上 ,忽略了产生 复合电流、隧穿电流和表面复合电流的影响 ,假设在低温下扩散电流起主要作用 ,并认为电极与结区之间的接触为欧姆接触 ,建立了环孔p n结的电流模型。
3)  Ear piercing
穿耳环孔
4)  circular ring hole
圆环孔
1.
According to the theory on optical image formation, detail derivation is made of optical transfer function in an incoherent system of optical projection from optical pupil through an ideal circular ring hole, together with calculation and graph analysis of optical transfer functions through several special circular ring holes bing carried out.
根据光学成像理论,详细推导了在理想状态下圆环形出射光瞳的衍射受限(非相干)系统的光学传递函数,并对几个特殊圆环孔的光学传递函数进行了计算和作图分
5)  Ring porous wood
环孔材
1.
The results showed that the other indices of the three ring porous wood from plantation were slightly larger than those of natural forest except that elastic modulus of bending,impact toughness and resistance to cleavage from plantation were less than those of natural forest.
通过对檫树、酸枣、米槠人工林和天然林木材物理力学性质的测定和比较分析,结果表明:3种环孔材人工林木材除抗弯弹性模量、抗劈力和冲击韧性小于天然林外,其余指标均稍大于天然林。
2.
The study on the stem secondary xylem of Lonicera maximowiczii,reveals the wood belongs to ring porous wood.
研究紫枝忍冬茎次生木质部结构,其为环孔材。
3.
The anatomic study of the secondary xylem in Oplopanax elatus stems were conducted and its results showed that it was a ring porous wood and its rays were heterogeneous Ⅱ ones.
东北刺人参为五加科植物[1],本文对其茎次生木质部进行结构植物学研究,发现其为环孔材,射线为异形型。
6)  ring-porous wood
环孔材
1.
regeli presented very great difference between the vessel members in its early and late woods and belonged to ring-porous wood;its vessel members had simple perforation plates,heterotypic Ⅱ-b rays helical thickened fiber tracheids and sepate wood fiber.
结果表明:东北雷公藤茎次生木质部早晚材导管分子大小差异极大,为环孔材;导管分子穿孔板均为单穿孔板;异型Ⅱ-b射线;纤维管胞具螺纹增厚;具分隔木纤维。
参考词条
补充资料：刀具:深孔钻
      专门用於加工深孔的钻头。在机械加工中通常把孔深与孔径之比大於6的孔称为深孔。深孔钻削时﹐散热和排屑困难﹐且因钻杆细长而刚性差﹐易產生弯曲和振动。一般都要藉助压力冷却系统解决冷却和排屑问题。深孔钻按排屑方式分为外排屑和内排屑两类。外排屑的有枪钻﹑深孔扁钻和深孔麻花钻等﹔内排屑的因所用的加工系统不同﹐分BTA(Boring and Trepanning Association)深孔钻﹑喷射钻和DF(double feeder)深孔钻3种(见图 几种不同的深孔钻 )。枪钻﹕只有一个切削部分﹐最早用於加工枪管。钻削时﹐切削液从钻杆中间进入﹐经钻头头部的小孔喷射到切削区﹐然后带著切屑从钻头的V形沟槽中排出。枪钻适用於加工孔径2～20毫米﹑孔深与孔径之比大於100的深孔。BTA深孔钻﹕切削液从钻杆与孔壁的间隙处送入﹐靠切削液的压力将切屑从钻杆的内孔中排出。BTA深孔钻适用於钻削孔径6毫米以上﹐孔深与孔径之比小於100的深孔﹐其生產效率比枪钻高3倍以上。喷射钻﹕一种多刃内排屑深孔钻﹐有内﹑外两层钻管﹐大部分切削液从内﹑外钻管的间隙中进入切削区﹐然后连同切屑进入内管﹔另一小部分切削液则经由内管尾端的月牙形孔进入内管﹐產生喷射效应﹐形成低压区﹐帮助抽吸切屑。喷射钻不要求严格的切削液密封装置﹐适用於钻削直径18毫米以上﹑孔深和孔径比小於100的深孔。DF深孔钻﹕这种钻头吸收了BTA深孔钻和喷射钻的优点﹐採用单管﹐排屑靠推压和抽吸双重作用﹐提高了排屑能力﹐可钻削孔径在8毫米以上的深孔。
         枪钻常用高速钢或硬质合金製造。各类内排屑深孔钻可根据尺寸大小﹐採用焊接或机械夹固式可转位硬质合金刀片的结构。深孔钻上的导向块起导向和定心作用﹐减少钻孔的偏斜和切削时的振动。深孔钻的刀齿和导向块的布置主要考虑分屑和切削时径向力的平衡。刀体与钻杆可用焊接或方牙螺纹联接。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。