tubular
adjective /ˈtjuːbjələ(r)/
  /ˈtuːbjələr/
- made of tubes or of parts that are like tubes in shape管子构成的;有管状部分的 - a tubular metal chair用金属管做的椅子 
 
- a tubular metal chair
- like a tube in shape管状的 
词源late 17th cent.: from Latin tubulus ‘small tube’ + -ar.