滑动部分；滑块；游标；制动块的英文

slipper

• 滑动:    slither; slippage; ...
• 部分:    part; section; por ...
• 滑:    slippery; smooth
• 块:    piece; lump; chunk
• 游标:    nonius; vernier
• 制动:    braking; retardati ...