常见例句双语例句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.对冻结风化基岩、砂砾层或卵石层，冻土挖掘机效率低，宜采用钻眼爆破法，采用抓岩机装载冻土。 返回 weathered pebble