Gravity meters and their operators were lowered to the water bottom in diving bells.
重力仪及操作员们都在钟形潜水器内沉到水底。
词典释义:
潜水钟
Gravity meters and their operators were lowered to the water bottom in diving bells.
重力仪及操作员们都在钟形潜水器内沉到水底。
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