Carpet according to the different place of performance that is divided into six levels:
(1) mild household, laid is rarely used in the room or area;
(2) moderate household level and the professional level of use: used in the master bedroom or dining room and so on;
(3) or moderate use, general family expenses for the living room, frequent traffic department such as stairs, corridor, etc.;
(4) severe household level or general professional level: used in the severe wear in the home places;
(5) major professional use level: family usually don't have to;
(6) deluxe: the good quality of the carpet, fiber length, thus luxurious air.