入孔与进料口的大小和相对位置，可根据需求改变。
Both size and related position of the manhole and the feeding port are variable upon necessity.
本文简要介绍了热裂化装置反应塔入孔加强板角焊缝的断裂及其补焊情况。
This paper briefs the fractures of fillet weld of manhole reinforcing plate in react ion tower of thermal cracking plant and its repairing welding.
在研究悬浮液入孔问题时，粒子在孔外任意位置所受的力和力矩是所需的最基本数据。
For any study of a suspension entering a pore, the knowledge of the force and moment exerted on a solute particle in an arbitrary position outside the pore is essential.
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