technical description
SZ.L .. Cemented one-tube(SZL..)- or two-tube (SZZL..) adjustable slide resistors with manual operation (standard version)
SU.L .. Uncemented one-tube (SUL..)- or two-tube (SUZL..)- adjustable slide resistors with manual operation (special version)
- in laboratory version
- enclosure with aluminium coloured varnish and rubber feet
- degree of protection IP 20.