The orebody in Jinshan gold mine is flatly inclined and has thin to medium thickness, with a complicated morphology, thus the mining is very difficult.
金山金矿矿体属于缓倾斜薄至中厚矿体，形态复杂，开采难度大，原采用全面法开采，采矿损失大、工效低、采场生产能力小。
These folded rocks are composed of medium to thick bedded limestone of Ordovician and of thin bedded shale and siltstone of Silurian.
这些褶皱岩层是由奥陶系的中层至厚层石灰岩以及志留系的薄层页岩和粉砂岩组成。
This paper describes the characteristics of medium and thin slab continuous caster in detail and the principles must be observed to fit these characteristics during designing the casting powder.
详述了中薄板坯连铸机的特征，以及保护渣设计过程中，为适应这些特征所必须遵守的原则。
In a medium meant to convey images, his power was in conjuring them out of thin air.
作为传送图象的媒介，他的权力是在无中生有地变出他们上。
Part of ore body in Jinchangyu Gold mine is this kind of gently inclined thin and medium thick ore body with unstable roof, it is hard to mine.
金厂峪金矿部分顶板不稳定的缓倾斜薄至中厚矿体，其开采难度很大。
Mining of gently inclined thin and medium thick ore body with unstable roof isregarded as typical hard-to-mine ore body.
顶板不稳定的缓倾斜薄、中厚矿体为典型的难采矿体。
Mining of gently inclined thin and medium thick ore body with unstable roof isregarded as typical hard-to-mine ore body.
顶板不稳定的缓倾斜薄、中厚矿体为典型的难采矿体。
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