spare parts
... spare parts备件;配件;备用件;散件 spare capacity闲置的生产能力;剩余产能;剩余容量;备用产能 hot spare热后备;热备份;热备援;热备用 ...
backup
... backpay补发工资 backup备份,备用件,为......备份 back-upfacility支持设备,辅助设备 ...
parallel redundancy
Spare Part List
relay backup