Suits the long material, the plate, the annularmaterial and the anomalous cargo memory.
适合长物料、板材、环型物料和不规则的货物存储。
2
The material used to permanently seal annular Spaces between casing and borehole walls.
用于永久封隔套管和井壁之间的环型空间的材料。
3
A plurality of vertically long annular blanks 3 are punched out from the material 2 having a prescribed width, and the vertically long annular blanks 3 are formed on the annular ring-shaped member 1.