Device for adjusting length of gas spring
Device for adjusting the height of the seat of arm-chairs and th
Device for controlling the height of a swivel chair
Device for locking the drawing board of a drawing table assembly
Device for removably mounting of a lengthwise-adjustable column
Display construction
Display panel and elevation adjusting base of the same
Display stand
Display stand
Display stand
Display stand
Doll stand
Drafting board base
Drafting stool
Drawing board locking device