| 摘要 |
Working plate (10) is formed of forty-eight sections (10'), with groove (12) extending through the majority of the thickness of the plate. In one form, dovetail grooves are machined to the back of the sections of the plates (10') attached to the base plate (19). In an alternative arrangement, fixing rails are attached to the backs of the sections and the dovetail grooves are in the base plate (19). |
