Natural History Highlight
21. Drilling holes in the rock using the holes in the steel as a guide. The anchor bolts set every 6 “ will have a washer and nut to keep the steel in place. (Click here for full resolution.)
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21. Drilling holes in the rock using the holes in the steel as a guide. The anchor bolts set every 6 “ will have a washer and nut to keep the steel in place. (Click here for full resolution.)
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