A.7min B.10min C.15min D.20min E.30min
A.0°±5° B.0°±10° C.0°±15° D.0°±20° E.0°±25°
A.在頦托標(biāo)尺向前5mm B.在頦托標(biāo)尺向前10mm C.在頦托標(biāo)尺向前15mm D.在頦托標(biāo)尺零位 E.在頦托標(biāo)尺向后10mm