at a rough estimate造句

• At a rough estimate
  据粗略估计
• At a rough estimate the equipment ' s cost price is about 120000 yuan and will fetch at least 250000 yuan . it can dispose of about 20 sets by using kuangtong , ltd ' s marketing ability . in a all marketable tomorrow will be beautiful
  该设备研制成功、定型并批量生产后，设备成本约12万元，市场售价可达25 ? 30万元，每年可销售大约20台套，其设备销售额达500万元。