How long is the federal hospital bed maintenance period?

Does the subject want to ask "how long is the warranty period of the federal mattress?" Fifteen years.

1, the federal mattress has ten layers of protection, and the warranty period is fifteen years.

2. The Federal Multifunctional Mattress is a natural germane and precious jade which is scientifically arranged by the Federal Institute of Bioengineering of the United States to simulate the geomagnetic environment in Changshou Village, Bama, adopting nine leading technologies in the United States.