holes on 直径6 BCD,用于法兰中,BCD意思应该是法兰孔中心点围成的圆周长,我想知道BCD英文全称是什么?

holes on 直径6 BCD,用于法兰中,BCD意思应该是法兰孔中心点围成的圆周长,我想知道BCD英文全称是什么? 英语翻译6 holes (直径符号）16100 for bolts HM14*40 in bottom flonge 英语翻译螺栓孔直径翻译是diameter bolt holes 改错:The police found some bullet holes on the walls and some blood marks on them loop holes i have holes on the top and botton.and i have holes in the middle,yet i still hold water.i have hol 3 holes:tap M4 on 59 PCD,在机械图纸上是什么意思 There arr two big holes _____the wall.A.in B.on C.at 请教机械制图上的英文：4holes tap M10*1.5P equi-spaced as shown on 140.00 Only want to see your smile,NO TEARS on your face,NO HOLES inside your heart.中文意思 I sat down on one of those modern chairs with holes in it and waited.I sat down on one of those modern chairs with holes in it and waited.新2上的句子,with holes in it 作什么成分,求讲解, i sat down on one of those modern chairs with holes in it为什么用it?请问为什么用it？不是应该用代词them吗？因为with holes in it修饰的是modern chairs？ 6 holes tap M6－1.0×1.5 看不懂英文图纸啊, core holes怎么翻译 via-holes的意思 from then on用于何种时态? 1,i went to the zoo ( )my home last sunday.介词填空2,i have lunch ( )12:10.3,they are talking( )their friends.4,i saw some drawings( )the cave wall5,they dug many holes( )the ground.6,there is a map ( )the world on the table.7,a bird is singing ( 有句外贸英语看不懂,4/c printed header with heat seal,2 hang holes on header for shelving 这句话应该怎么翻译啊