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地盤， じばん， ちばん
1. ground, crust (earth), bed (gravel, river, etc.)
2. foundation (building, etc.), base
3. constituency, power base, support (electoral), footing, foothold
地表、地壳(地球)、地层(砾石层、河流沉积层等)；基础(建筑物等)；底座；地盘；选区、立足点、立足之地