短語詞組短語length - diameter ratio 長逕比length and diameter ratio 長逕比length to diameter ratio 直逕長度比;長逕比;長度直逕比extruder length to diameter ratio 擠塑機(jī)長逕比great length -diameter ratio 長逕比大Optimal length -diameter ratio 最佳長逕比critical length -diameter ratio 臨界長逕比hole length to diameter ratio 長逕比 返回 length diameter ratio