阶梯价格制度 system of tiered pricing for electricity, water, and natural gas

用电用水阶梯价格制度 tiered prices for household consumption of electricity and water

居民阶梯电价改革方案 progressive pricing for household electricity consumption

阶梯计价 differential pricing ; tiered pricing ; volumetric pricing

阶梯电价 tiered pricing for electricity ; step tariff

价值阶梯 Value Hierarchy ; Value Ladder

阶梯形报价 Step-wise bidding

阶梯式水价 laddered water price