ANCHORAGES, ANCHOR BOLTS, BARS (MATERIALS), BOLTS, MINING, ROCK BOLTS, ROOFTRUSSES, ROOFS, SAFETY, SAFETY ENGINEERING, STRUCTURAL MEMBERS
被代替标准
2011-07-27
Covers the chemical, mechanical, and dimensional requirements for
roof and rock bolts and accessories. Addressed in this Standard
are double-end threaded, headed, and slotted ...