A.BJ2020:23~26mm B.CA1092:26~29.5mm C.EQ1092:29.5~32mm
A.0.08~0.20mm B.0.08~0.205mm C.0.045~0.320mm
A.從兩邊向中間分二至三次擰緊 B.從中間向兩邊分二至三次擰緊 C.依次按順序擰緊