Description  Claims  Drawing  Cited references 

JP2513818B   [0010] 
JPS445167B   [0010] 
JPH639480B   [0010] 
JPH288792B   [0010] 
JPS5663577B   [0010] 
DE2211012A1   [0011] 
DE674850C   [0012] 
FR1355203A   [0013] 
FR1078557A   [0014] 
US2061059A   [0015]