| 摘要 |
The apparatus comprises, between each pair of upper and lower bearing blocks, a shim or strut which provides a support for two bearing blocks on one another. Each of the upper bearing blocks is extended, in an upper portion and toward an inside of said apparatus, by a cantilevered portion subjected to action, in a downward direction, of a pressure exerting vertical jack mounted in an upper portion of said apparatus. A vertical and transverse plane containing a central axis of each pressure exerting vertical jack is situated between a vertical and transverse plane in which is situated a shim or strut placed between the bearing blocks and a vertical and transverse plane of raceways for an upper cutting cylinder and a lower cutting cylinder.
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