References
- Kulla , R . 1986 . ‘A hydraulic double spot welding head for use with the type FP 5/20 microspot welding machine.’ . ZIS-Mitteilungen , 28 ( 4 ) : 448 – 451 .
- Widerhold , M and Hocke , H . 1985 . ‘The type ISMI impulse current measuring instrument.’ . Schweisstechnik (Berlin) , 35 ( 10 ) : 472