| 摘要 |
<p>This invention deals with the manufacturing of a lost casing of polygonal horizontal section throughout its height of inner and outer wall,by making use of an assembly jig made itself from standard elements(1,2,2a,3,4,5) such as frames (6-9 and beams, sothat a series of jigs of different dimensions can be made. The casing being made on said jig by releasebly attaching plates(12,13) to the jig and by interconnecting said plates in seamless way. Inner and outer casing can be made on separate jigs. A series of standard frames may be applied.</p> |
