Except the dish grinding wheel or the cutting-off grinding wheel, the thickness of the guard that peripheral plate and fixed-side plate are made of a piece of seamless rolled steel shall base on the highest using peripheral velocity, the thickness of grinding wheel, the diameter of that wheel and the guard-plate type to be the value listed in Attachment table 29 regardless the restriction of the first paragraph in the preceding Article 98 .The end of the removing- side plate in the preceding paragraph shall be bent as shown in the Attachment figure 7 if the construction of the peripheral plate in the fixed- side and the side plate in the removing- side is by means of a connection way.Attachment table 29.pdfAttachment table 29.docAttachment figure 7.pdfAttachment figure 7.doc