chisel hard
凿硬
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Sponsors participate at every stage of the paleontological process, side-by-side with a site scientist: from the use of hammer and chisel to free fossils from hard rock, to the moulding of bone replicas for display at the on-site laboratory.
BBC: The dinosaur route of northwest Patagonia
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