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QOEQ, 2020-4-10 · 5200-00 1 DD: 04/10/2020 MONTANA AIR QUALITY PERMIT . Issued to: Tintina Montana Inc. P.O. Box 431 . White Sulphur Springs, MT 59645P&Q University Lesson 4, 2019-8-28 · The weight per primer used in the blastholes should be four to six times the minimum primer weight. Cast boosters typically have a length-to-diameter ratio of 3:1 to 4:1. The primer should have a sufficient diameter to act on an adequate cross sectional area of the explosive charge, thereby ensuring efficient initiation.Engineering360, 2020-1-1 · Engineering360 is a search engine and information resource for the engineering, industrial and technical communities. We help you quickly find industrial parts, specifications and services.