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摘要

PROBLEM TO BE SOLVED: To provide a grating with few restrictions when executed.;SOLUTION: The grating 2 is provided with a grating body 3 and a receiving frame 4 for receiving the grating body 3. The receiving frame 4 has a receiving frame body 4a and an extended part 4b. The receiving frame body 4a is constituted of raising materials 6, 6 respectively placed on lid mounting parts 1a, 1a of a groove block and coupling members which couple the raising materials 6, 6 at the respective end sides. The extended parts 4b are extended from the respective coupling members to be entered under a top wall 1c of the groove block 1. The extended parts 4b are formed at extended pieces 8 which are separated from the receiving frame body 4a, and the extended pieces 8 are detachably mounted and fixed to the coupling members.;COPYRIGHT: (C)2007,JPO&INPIT