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For the frozen weathered bedrock, sandy gravel and pebble bed, it is more suitable to use drilling and blasting method than to use the frozen soil excavator. 對凍結風化基巖、砂礫層或卵石層，凍土挖掘機傚率低，宜採用鑽眼爆破法，採用抓巖機裝載凍土。