椭圆—立椭圆孔型系统
oval edge oval pass system
细圆柱体直径
Diameter of thin cylinder
直立圆柱
vertical circular cylinder
right circular cylinder
直圆椭圆
right circular elliptical
DBT支架立柱立柱
hydraulic cylinder of DBT roof support
立体立体选择性合成
stereoselective synthesis
大模数圆柱直齿轮
spur gear with big modulus
均匀带电直圆柱面
uniform electric straight cylinder surface
立体直流电法
stereo DC electric method
斜、直圆柱绕流
flow around perpendicular and oblique circular cylinders
圆柱直齿齿轮
spur gear
cylindric straight-tooth gear
圆柱直齿轮
column straight gear
spur gear
cylinder gear
straight and cylindrical gear wheel