*> ============================================================
      *> TEL-BILLING.cpy — 电信计费通用记录布局 (45 bytes)
      *> Telecom Billing Common Record Layout
      *> 可用于替代 STD-REC.cpy，字段宽度完全一致
      *>
      *> Fields (45 bytes total):
      *>   BILL-KEY       PIC X(10)  — 主键 (客户/合同/请求书ID)
      *>   BILL-CUST-ID   PIC X(10)  — 客户编号
      *>   BILL-PLAN-CODE PIC X(03)  — 套餐代码 (P01/P02/P03)
      *>   BILL-AMOUNT    PIC 9(09)  — 金额/用量 (分为单位)
      *>   BILL-STATUS    PIC X(01)  — 状态标志
      *>   BILL-RESERVED  PIC X(12)  — 预留
      *> ============================================================
       05 BILL-KEY         PIC X(10).
       05 BILL-CUST-ID     PIC X(10).
       05 BILL-PLAN-CODE   PIC X(03).
       05 BILL-AMOUNT      PIC 9(09).
       05 BILL-STATUS      PIC X(01).
       05 BILL-RESERVED    PIC X(12).