stiffened ring的相關資料：
臨近單詞
stiffen
stiffened thin-walled tube
stiffening plastic substance
stiffen the shirt with starch
stiffened composite structure
stiffening ribbed hollow pipe
stiffened compression element
Stiffener to deck plate detail
stiffened-thin-walled tube
stiffened earth-retaining wall
stiffened cement soil mixing pile
