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reference block
auto.	基准程序段
met.	校对用块规; 检验用块规; 标准试块; 校对量块 【块规】
nucl.pow.	基准试块
space	参考试块
tech.	标定参考块; 基准块; 对比试块; 参考程序块; 标准块; 比较试块

reference block: 3 phrases in 2 subjects

Hydroelectric power stations	1
Technology	2