Yuav ua li cas xaiv cov qhov rooj sab nraud rau koj lub tsev?

Wood qhov rooj yog qhov kev xaiv classic uas feem ntau tshwj xeeb tshaj plaws hauv kev cai tsim.

Cov qhov rooj hlau feem ntau suav nrog ua npuas dej insulated hauv cov vaj huam sib luag. Lawv muaj zog, uas yog qhov zoo rau kev ruaj ntseg.