A.當(dāng)檔距小于100m時(shí),應(yīng)安裝1個(gè)防振鞭 B.當(dāng)檔距在100~250m時(shí),應(yīng)安裝2個(gè)防振鞭 C.當(dāng)檔距在250~400m時(shí),應(yīng)安裝4個(gè)防振鞭 D.當(dāng)檔距在400~800m時(shí),應(yīng)安裝6個(gè)防振鞭