collan.颈名词collum的复数形式.
COLLpref.表示“粘的;胶的”=collo.
collocated grid同位网格
collapsing loss丢失损耗
collapsible die可拆模,组合模
collapsible bit活头钻头
colluvial wedge崩积楔
colltube heater蛇形管加热器
collimation lens准直镜
collimator stand准直器架
collophanite ore胶磷矿
collinear cracks共线裂纹