The arranged pipe heater of vertical cylindrical storage oil tank often occurred damage at the joint zone between the distributor pipe and bundle.

立式圆筒形储罐用的排管式加热器，在分配管与管束连接处经常发生损坏。

youdao

The arrangement and layout make a public impact on the steam resistance extent of condenser, uniform steam distribution in the tube bundle and the occurrence of dead zone full of air, etc.

管束的排列和布置型式对凝汽器的汽阻大小、蒸汽在管束中的分配是否均匀，以及是否会出现空气积聚的死区等都有影响。

youdao

Histocytological observations on explants indicated that the callus was induced from cells of cortex, phloem and peripheral zone of vascular bundle.

细胞组织学研究表明，由外植体皮层细胞、韧皮部细胞及维管束周围细胞均可脱分化启动产生愈伤组织。

youdao