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1)  Head delivering
取头
2)  coring bit
取心钻头
1.
Based on strata characteristics,designed 8? matrix bodied triple stepped PDC coring bit and steel bodied multiple stepped tungsten-carbide-tipped coal coring bit.
为满足设计要求,选择平顶山五环实业有限公司研制的大口径绳索取心器,并根据地层特点,设计了81/2胎体式三阶梯PDC复合片绳索取心钻头及钢体式多阶梯硬质合金取煤钻头。
2.
The bottom hole flow physical model of a kind of PDC coring bits is established considering the effect of junk slot and teeth layout in this paper.
以一种现场常用的PDC取心钻头为原型,充分考虑排屑槽和切削齿对于井底流动的影响,建立了与实际相接近的PDC取心钻头井底流场的物理模型。
3)  fetal delivery
托取胎头
1.
Analysis of modified method for 48 cases of fetal delivery in cesarean section of second stage of labour;
第二产程剖宫产改良式托取胎头48例临床分析
4)  water intake head
取水头部
1.
Brief introduction of the water intake head of Tengqiao waterworks in Wenzhou;
温州市藤桥水厂取水头部简介
5)  core bit
取芯钻头
1.
Development and application of large diamond compact core bit;
大口径金刚石复合体取芯钻头的研制及应用
6)  head of water supply
取水头
1.
A hydraulic model study on the head of water supply in a drawing project;
取水工程取水头水力特性的试验研究
补充资料:倍司特克、CMX、头孢塞肟四唑、氨噻肟唑头孢菌素、头孢氨噻肟唑、噻肟唑头孢
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