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依据国家标准建立了用于校准β剂量（率）仪和计量计并确定其能量响应的β参考辐射。在其刻度位置上的β剂量率，用外推室系统进行了定度和验证。
The beta reference radiation for calibrating the beta dose meter and meter and determining its energy response was established in accordance with national standards. The beta dose rate at its scale position was calibrated and validated using an extrapolated chamber system.