manhole size的意思|示意

Is mainly the size effect and solidification, shrinkage, stress and other issues clearly, to avoid or reduce the segregation, iron manhole cover deformation and crack defects.

主要是明显的尺寸效应和凝固、收缩、应力等问题，避免或减少铸铁井盖的成分偏析、变形、开裂等缺陷的产生。

Nozzle and manhole size shall not be changed by Vendor.

卖方不能改变设备口及人孔的尺寸。

Both size and related position of the manhole and the feeding port are variable upon necessity.

入孔与进料口的大小和相对位置，可根据需求改变。