双向内膜下血管成形
bidirectional subintimal angioplasty
内向内向型分子内还原关环
endo-endo mode intramolecular reductive cyclization
向下向上焊
welding upward and downward
G蛋白偶联内向整流型钾通道
G-protein coupled inwardly rectifying potassium
凹向下的
concave downward
concave downward‘ concave down
不连续双斜向内肋管
discrete double-inclined ribs tube
船舶纵向下水
ship end launching
ship longitudinal launching
longitudinal vessel launching