open pass 开口孔型 ; 开口式轧槽 ; 开敞环槽辊轧
open hole by-pass valve [油气] 裸眼旁通阀
open roughing pass 开口粗轧孔型
open ice support block pass 开冰支持块传递 ; 冰块通过公开支持
open box pass 开口箱形孔型
open-hand pass 张开手传球
open slitting pass 开口切分孔
open breakdown pass 开口开坯孔型
open a trade pass 开辟贸易口岸
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