European Italian Designer Contemporary Modern Furniture, Bangalore ...
Features: Inclusive back- and armrest function; Nosag springs and elastic belting; Pocket springs and high quality foam; Solid wooden frame ...
www.casamodern.com/modern_contemporary_glamour_sofa_collect... -

Seat springing
The most used springs for the seat springing
are the zigzag steel ones (so-called Nosag
springs). They have been used for 40 years
in the upholstery where it is distinguished
between flat springs and round springs. The
type name comes from the spring’s form
when it is stretched.
http://64.233.169.104/search?q=cache:uXldEu2c6GwJ:www.ada-mo...