1) screwed steel conduit
螺头钢导管
2) spiral steel tube
螺纹钢管
1.
Taking saturated ammonia vapor of the large-scale refrigeration system as working material and carrying out experimental research on condensed heat exchange which takes place in the outer surface of 4 kinds of spiral steel tube whose height is 4 000 mm,norm related formula of outer tube s condensed heat exchange is gained.
以大型制冷系统中的饱和氨蒸气为工质 ,通过在高度为 40 0 0 m m的四种螺纹钢管外表面上凝结换热的试验研究 ,得到了管外凝结换热的准则关联式。
4) spiral welding steel pipe
螺焊钢管
5) helical tracheary elements
螺纹导管
1.
Objective To study secondary wall formation of helical tracheary elements in the stem of Cucurbita moschata.
目的观察南瓜(Cucurbita moschata)茎螺纹导管发育过程中次生壁的形成过程。
6) spiral duct
螺旋导管
补充资料：宝鸡石油钢管厂大口径薄壁钢管的φ508排辊成形机组
宝鸡石油钢管厂大口径薄壁钢管的φ508排辊成形机组
宝鸡石油钢管厂大口径薄壁钢管的中508排辊成形机组
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