problem centered

同义词释义

1)problem centered,疑难为主2)problemcentered,疑难为主3)difficulty,疑难4)answer difficult problem,疑难解答5)complex gas zone,疑难气层6)problem well,疑难井7)tough reservoir,疑难储层8)Difficult problem,疑难问题9)Transfusion difficulty,疑难输血10)swelling of arms,疑难病证