The expansion and contraction standards and the light projector which has that

摘要

(57) Abstract Topic When contracting it was superior in the security which does not have the apprehension which under slumping is doneThe expansion and contraction standards and the light projector which has this are offered. SolutionsThe equipment which is installed on the top being weight ones, thatWith significance standard pillar 1b of each inside and 1c the slump lowering way assuming that it did,The compressed air inside air chamber 8a and 8b becoming the cushionTo prevent under slumping, the compressed air inside air chamber 8a and 8b the air holeBeing discharged gradually from 9a and 9b, standard pillar 1b of each inside and 1cIt falls slowly.