notch bar 凹口试片

notch bar test 缺口杆试验

notch-bar hot bed 齿条式热床

notch bar bending test 缺口弯曲试验

notch-bar impact strength 缺口试样冲击值

notch-bar cooling bed 齿条式冷床

notch bar hot bed 齿条式热床

one-bar-per-notch 每个齿槽一根棒材

notch bar cooling bed 齿条式冷床