Except a grinding necessary portion, the guard shall base on the following provisions to cover:1. For the side-grinding wheel: covering the peripheral surface and the outside of fixed-side.2. For a portable grinding wheel guard except that in the preceding subparagraph: If the peripheral plate and the fixed side plate are made of a piece of rolled steel with seamless, then the peripheral surface of that wheel, the outside of the fixed-side and the outside of the removing-side as shown in figure. 5 shall be covered. If the end of the peripheral plate is bent toward the removing-side by 5 millimeters as shown in Attachment figure 5 and its thickness is over that shown in Article 23(1) by 20 percentage, then the guard for the outside of the removing-side can be exempted.3. Besides the guards in the two preceding subparagraph: The peripheral surface, the two sides including the side of the shaft end in the removing-side.The grinding necessary portion in the preceding proviso shall base on the grinder type and provisions in the Attachment figure 6.Attachment figure 5.pdfAttachment figure 5.docAttachment figure 6.pdfAttachment figure 6.doc