pedion
单面晶族 monohedral class
单面平晶 optical flat
单接面晶体管 unijunction transistor
可程式单接面电晶体 programmable unijunction transistor
单接面晶体 un-junction transistor
可程式单接面晶体 Programmable UJT
单方面结晶 MIUC
低指数单晶面 Low index single crystal surface
但是单面焊打底层焊缝中出现的沿焊缝柱状晶结晶方向的柱状气孔，严重地影响着船舶焊接质量。
But in the backing welding, columnar grain-growth will be appeared in the direction of crystal direction, it effects the welding quality seriously.
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