乌克兰采购需求：制氧机、制氧机、病人监护仪、中央监护系统、脉搏血氧仪、白细胞分析仪

I'm in need of a specific inner intake air filter for an oxygen concentrator I'm working with. I've searched through various sites but haven't been able to locate it anywhere. Could you assist me in sourcing this filter? Any information on availability or potential suppliers would be greatly appreciated. Looking forward to your help on this matter!