青云翻译

9 #, 10 # region into four groups of excavation and backfill, each group of machines with above.

9#, 10# districts divided into 4 groups for excavation and backfilling, each group of machines equipped with as above.

9#, the 10# area divides into 4 groups to carry on respectively excavates with the backfill, each group's machinery provides same.

9 #, 10# district was divided into four groups, digging and backfilling of each group machinery equipped with idem.

9#, 10# districts divided into 4 groups for excavation and backfilling, each group of machines equipped with as above.