短语词组短語Filth blockage [制冷]髒堵blockage signal 堵煤信號paraffin blockage 蠟堵blockage ratio 阻塞比active blockage [金融]主動禁止兌換Nitrogen blockage 氮塞Light Blockage 光阻法blockage calculation 堵塞計算 返回 blockage