✦ LIBER ✦

Choosing the thread profile for a roof bolt : Sov Min Sci, V13, N1, Jan–Feb 1977, P87–88

✍ Scribed by B.I. Strygin; V.N. Atamanov

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

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General case of interaction between a hy

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