1) built-up mandrel
组合圆棒
2) bar fabricating
组合棒
3) combined grounding rods
组合接地棒
1.
New analytic formula for grounding resistance of combined grounding rods in two~layer soil;
双层土壤中组合接地棒接地电阻的新解释公式
4) assembled tube
组合圆管
1.
The assembled tube was made of beryllium tube and tungsten tube, and was produced by over fitting.
组合圆管外层为铍管,内层为钨管,二者通过过盈配合形成。
5) Circle combination
圆组合
1.
The first part is about the new concept of circle combination,and the second part includes 7 groups of combinatorial twin identities,which are composed of corresponding circle combination identities belonging to combinatorial identities.
全文分为两部分:第1部分是圆组合新概念;第2部分是组合恒等式对应圆组合恒等式组成的7组孪生组合恒等式。
6) the combination of full circle
全圆组合
补充资料：圆棒榫
圆棒榫 现代家具常用榫头之一，其形状象圆棒，一般做双榫。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条