The guard for a bench grinder or a bed grinder shall have a tongue plate or other means to adjust the gap between the peripheral of grinding necessary portion and the guard to be below 10 millimeters.The tongue plate in the preceding paragraph shall meet the following provisions:1. It is of a plate shape.2. The material is rolled steel set in Article 96(1).3. The thickness is equivalent or over that of the peripheral plate of the guard , moreover it shall be over 3 millimeters and below 16 millimeters.4. The effective cross-section area in the entire cross-section area shall be over 70 percent and the effective vertical section area in the entire vertical-section be over 20 percent.5. The diameter and number for mounting bolts shall base on the thickness of grinding wheel in Attachment table 34.Attachment table 34.pdfAttachment table 34.doc