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el. 级配过滤器; 级配滤层
eng.geol. 级配过滤层
oil 级配滤池; 级配滤器
tech. 颗粒过滤器; 级配滤池; 级配滤层; 级配滤层; 回水过滤器; 分级滤波器; 分级滤池; 分级过虑器; 分级过虑池
graded filter: 8 phrases in 3 subjects
Hydroelectric power stations1
Metallurgy1
Technology6