plane to plane contact element
airwater pipeline trenching sled
concrete filled sled tube CFST
sled
滑车
雪橇
持续性低效率血液透析
拖运器
雪车
撬滑台
水面拖靶
超辐射发光二极管
雪撬
摘棉机
乘雪橇
用雪橇运
冰橇
sled velocity and distance meter
160120 focal plane array
35mm AF Focal Plane Cameras
35mm NON-AF Focal Plane Cameras
3-point Forming a Plane
a half plane with a hole