A blowhole is set on the wall of said handle.

A compression side blowhole (B2) occurs in the region enclosed by a male rotor side blowhole contour (R1), a female rotor side blowhole contour (R2), and a bottom cusp line (k2).

The slag pot almost has no defects such as shrinkage cavity, shrinkage porosity, gas cavity, segregation, crack, non-metallic inclusions, thermal crack and cold crack etc.

The spray from a blue whale’s blowhole can reach up to 30 feet (9 meters) into the air.

A blowhole is set on the wall of said handle.

A compression side blowhole (B2) occurs in the region enclosed by a male rotor side blowhole contour (R1), a female rotor side blowhole contour (R2), and a bottom cusp line (k2).

Then, negative pressure is produced in the suction head by nipping the blowhole.

The area of the compression side blowhole (B2) can be reduced by configuring a female rotor side blowhole contour (R3) with a curve containing at least two arcs (C1, C2).

The slag pot almost has no defects such as shrinkage cavity, shrinkage porosity, gas cavity, segregation, crack, non-metallic inclusions, thermal crack and cold crack etc.

The purpose of the present invention is to reduce the length of the meshing seal line and to achieve further reduction of the blowhole area.

The invention relates to a machine, for the working of the walls which define the cavity of a continuous casting mould, with machine-cutting and/or polishing tools (12).

The blowhole may be covered to secure the gel in the receptacle for transfer from the matrix to a sample container.

The inventive method or device prevent an undesired deformation or a bursting open of the wall of the gas pocket(s) when heating the hollow body.

The method is simple in process, reliable in the abutting manner, and the appearance of the abutting blank has no deformation, dislocation or air holes.

In this manner it is possible accurately to regulate the cooling action and thus the film thickness in the individual peripheral regions of the film bubble.