大直径径向渗透率仪
full diameter radial permeameter
红外光透光玻璃
infrared transmitting glass
理想淬透直径
ideal diameter of hardening
临界淬透直径
critical hardenable diameter
透光直视旋切术
Transilluminated powered phlebectomy
X射线荧光光光谱
X-ray fluorescence spectrometry
亚微米直径光纤
Submicro-diameter optical fiber
大直径直缝焊管
Large－ sized straight weld pips
large-diameter butt welded pipe
large diameter longitudinal welded pipe
Large-sized straight welded tube
X光透视机
X-ray perspective apparatus
半凹透透镜断面
semi-concave-mirror cross section