小规模的山体滑坡不断落在沿着湖岸的陡峭碎石山坡上，巨大的卵石不时落入湖里。
Small landslides constantly add to the steep rubble slopes along the lake's shore, and large boulders periodically drop into the lake.
早前，我们用石灰岩鹅卵石调整现存路面，并用碎石填充剩下的部分。
As for the earlier, we recuperated the still-existing pavements in limestone cobbles and filled in the remnant parts with gravel.
振动击打：用于松散的砂、卵石、碎石地层的钻进及下套管等。
C. Vibration strike: it is used in drilling and casing with loosen sand, cobble stone and gravel layer etc.
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