A.4B.5C.6D.7
A.6B.7C.8D.9
A.(50±10)N/s ;(2400±200)KN/sB.(2400±200)N/s ;(50±10)N/sC.(50±10)N/s ;(2400±200)N/sD.(2400±100)N/s ;(50±10)N/s