Aluminium metal level control measures and practice effects during casting are introduced in detail according to the processes of aluminium semi-continuous DC-casting.
结合铝合金半连续铸造的生产工艺，介绍了铸造铝熔体液面的控制措施以及每种控制措施的实践效果。
Primary supporting parameters, construction method transformation from the normal route tunnel to the three-connected-arch tunnel, and engineering practice effects are introduced respectively.
介绍了该断面初期支护参数、由区间标准断面转换到三连拱隧道的工法及工程效果。
Primary supporting parameters, construction method transformation from the normal route tunnel to the three-connected-arch tunnel, and engineering practice effects are introduced respectively.
介绍了该断面初期支护参数、由区间标准断面转换到三连拱隧道的工法及工程效果。
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