短語(yǔ)詞組短語(yǔ)conical membrane shell 圓錐膜殼truncated conical thin shell 截錐薄殼conical l shell 錐殼conical frustum shell 截錐殼thin shallow conical shell 扁薄錐殼conical shell structures 圓錐殼thin conical shell 圓錐扁薄殼free conical shell 自由圓錐殼 返回 conical shell