A.靜壓導軌 B.滾動導軌 C.塑料導軌 D.氣動導軌
A.齒輪軸向間隙 B.齒頂間隙 C.齒側(cè)間隙 D.齒根間隙
A.MTBF=1000h B.MTBF=2500h C.MTBF=5000h D.MTBF=70000h