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单词 yielding arches
释义 yielding arches
[`yēld·iŋ `ärch·ǝz]
MINING ENGINEERING
Steel arches installed in underground openings as the ground is removed to support loads caused by changing ground movement or by faulted and fractured rock; when the ground load exceeds the design load of the arch as installed, yielding takes places in the joint of the arch, permitting the overburden to settle into a natural arch of its own and thus tending to bring all forces into equilibrium.
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