WO9813892-A  PATENT ABSTRACTS OF JAPAN vol. 012, no. 449 (E-686), 25.November 1988 & JP 63 178458 A (MITSUBISHI HEAVY IND LTD), 22.Juli 1988,;  PATENT ABSTRACTS OF JAPAN vol. 013, no. 435 (E-825), 28.September 1989 & JP 01 163973 A (OSAKA GAS CO LTD), 28.Juni 1989,;  PATENT ABSTRACTS OF JAPAN vol. 014, no. 316 (E-0949), 6.Juli 1990 & JP 02 103864 A (OSAKA GAS CO LTD), 16.April 1990,;  PATENT ABSTRACTS OF JAPAN vol. 015, no. 082 (E-1038), 26.Februar 1991 & JP 02 299167 A (FUJIKURA LTD), 11.Dezember 1990,;  PATENT ABSTRACTS OF JAPAN vol. 015, no. 348 (E-1107), 4.September 1991 & JP 03 133065 A (AGENCY OF IND SCIENCE & TECHNOL), 6.Juni 1991,;  PATENT ABSTRACTS OF JAPAN vol. 016, no. 018 (E-1155), 17.Januar 1992 & JP 03 236161 A (ISHIKAWAJIMA HARIMA HEAVY IND CO LTD), 22.Oktober 1991,;  PATENT ABSTRACTS OF JAPAN vol. 016, no. 344 (E-1239), 24.Juli 1992 & JP 04 104475 A (MITSUBISHI HEAVY IND LTD), 6.April 1992,;  PATENT ABSTRACTS OF JAPAN vol. 017, no. 006 (E-1302), 7.Januar 1993 & JP 04 237963 A (TOTO LTD), 26.August 1992,;  PATENT ABSTRACTS OF JAPAN vol. 017, no. 578 (E-1450), 20.Oktober 1993 & JP 05 174860 A (FUJIKURA LTD), 13.Juli 1993,;  PATENT ABSTRACTS OF JAPAN vol. 018, no. 324 (E-1564), 20.Juni 1994 & JP 06 076836 A (MITSUBISHI HEAVY IND LTD), 18.Maerz 1994, & DATABASE WPI Derwent Publications Ltd., London, GB; AN 94-129622;  PATENT ABSTRACTS OF JAPAN vol. 018, no. 599 (E-1631), 15.November 1994 & JP 06 231777 A (FUJI ELECTRIC CO LTD), 19.August 1994, & DATABASE WPI Derwent Publications Ltd., London, GB; AN 94-305951;  PATENT ABSTRACTS OF JAPAN vol. 096, no. 010, 31.Oktober 1996 & JP 08 162139 A (MITSUBISHI HEAVY IND LTD), 21.Juni 1996,;  PATENT ABSTRACTS OF JAPAN vol. 096, no. 010, 31.Oktober 1996 & JP 08 162140 A (KYUSHU ELECTRIC POWER CO INC;TOTO LTD), 21.Juni 1996, & DATABASE WPI Derwent Publications Ltd., London, GB; AN 96-347274EP870343-A  See references of WO 9813892A1WO9813892-A1  PATENT ABSTRACTS OF JAPAN vol. 012, no. 449 (E-686), 25.November 1988 &amp; JP 63 178458 A (MITSUBISHI HEAVY IND LTD), 22.Juli 1988,;  PATENT ABSTRACTS OF JAPAN vol. 013, no. 435 (E-825), 28.September 1989 &amp; JP 01 163973 A (OSAKA GAS CO LTD), 28.Juni 1989,;  PATENT ABSTRACTS OF JAPAN vol. 014, no. 316 (E-0949), 6.Juli 1990 &amp; JP 02 103864 A (OSAKA GAS CO LTD), 16.April 1990,;  PATENT ABSTRACTS OF JAPAN vol. 015, no. 082 (E-1038), 26.Februar 1991 &amp; JP 02 299167 A (FUJIKURA LTD), 11.Dezember 1990,;  PATENT ABSTRACTS OF JAPAN vol. 015, no. 348 (E-1107), 4.September 1991 &amp; JP 03 133065 A (AGENCY OF IND SCIENCE &amp; TECHNOL), 6.Juni 1991,;  PATENT ABSTRACTS OF JAPAN vol. 016, no. 018 (E-1155), 17.Januar 1992 &amp; JP 03 236161 A (ISHIKAWAJIMA HARIMA HEAVY IND CO LTD), 22.Oktober 1991,;  PATENT ABSTRACTS OF JAPAN vol. 016, no. 344 (E-1239), 24.Juli 1992 &amp; JP 04 104475 A (MITSUBISHI HEAVY IND LTD), 6.April 1992,;  PATENT ABSTRACTS OF JAPAN vol. 017, no. 006 (E-1302), 7.Januar 1993 &amp; JP 04 237963 A (TOTO LTD), 26.August 1992,;  PATENT ABSTRACTS OF JAPAN vol. 017, no. 578 (E-1450), 20.Oktober 1993 &amp; JP 05 174860 A (FUJIKURA LTD), 13.Juli 1993,;  PATENT ABSTRACTS OF JAPAN vol. 018, no. 324 (E-1564), 20.Juni 1994 &amp; JP 06 076836 A (MITSUBISHI HEAVY IND LTD), 18.M rz 1994, &amp; DATABASE WPI Derwent Publications Ltd., London, GB; AN 94-129622;  PATENT ABSTRACTS OF JAPAN vol. 018, no. 599 (E-1631), 15.November 1994 &amp; JP 06 231777 A (FUJI ELECTRIC CO LTD), 19.August 1994, &amp; DATABASE WPI Derwent Publications Ltd., London, GB; AN 94-305951;  PATENT ABSTRACTS OF JAPAN vol. 096, no. 010, 31.Oktober 1996 &amp; JP 08 162139 A (MITSUBISHI HEAVY IND LTD), 21.Juni 1996,;  PATENT ABSTRACTS OF JAPAN vol. 096, no. 010, 31.Oktober 1996 &amp; JP 08 162140 A (KYUSHU ELECTRIC POWER CO INC;TOTO LTD), 21.Juni 1996, &amp; DATABASE WPI Derwent Publications Ltd., London, GB; AN 96-347274