Siemens normally pay by TT at 30 da

Siemens normally pay by TT at 30 days.
For what reason do they want to change to 60 days now ?

ผลลัพธ์ (อังกฤษ) 2:

Siemens normally pay by TT at 30 days.
For what do they Want to Change Reason to 60 days now?