

|
Type
|
Frame
|
Description
|
Main frame material
|
|
A
|
BH
|
Heating, bolted
|
aluminum
|
|
BN
|
Safety glass, bolted
|
||
|
B
|
WH
|
Heating, welding
|
steel
|
|
WN
|
Safety glass, welding
|
