How is the office chair defined?

1. Office chair, in English, refers to the armchair that people sit in when they are working on the desktop in a sitting position in a narrow sense, and refers to all chairs used in the office in a broad sense, including staff chairs, conference chairs, visitor chairs, training chairs, etc. 1. Office chair: single person chair for indoor use. 2. Swivel chair: an office chair whose seating surface can rotate horizontally. 3. Classification according to the adjustment mode of office chair: a) Type I: office chair with adjustable seat and back; II: Office chair with adjustable back angle only; Non adjustable office chair: The relative position and angle of the chair back, seat surface and armrests are not adjustable.