A.1 B.2 C.3 D.4
A.(180+雙倍長(zhǎng)煙棒)/2 B.(270+雙倍長(zhǎng)煙棒)/2 C.(360+雙倍長(zhǎng)煙棒)/2 D.(450+雙倍長(zhǎng)煙棒)/2
A.煙支直徑 B.煙支搭口 C.煙支圓周 D.上膠紙邊位置