A.一層底灰、一層面灰B.一層底灰、數(shù)層中灰、一層面灰C.二層底灰、二層面灰D.一層底灰、一層中灰、一層面灰
A.一層底灰、一層面灰 B.一層底灰、數(shù)層中灰、一層面灰 C.二層底灰、二層面灰 D.一層底灰、一層中灰、一層面灰
A.20~25mm B.10~15mm C.20~30mm D.30~40mm