In order to avoid the pollution caused by slurry around bridge-building sites, they use dry-boring by rotary drills where possible.
桥梁施工中为减少泥浆对桥位处的环境污染，尽量采用旋转钻机干法成孔。
In order to avoid the pollution caused by slurry around bridge-building sites, they use dry-boring by rotary drills where possible.
桥梁施工中为减少泥浆对桥位处的环境污染，尽量采用旋转钻机干法成孔。
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