| 摘要 |
PROBLEM TO BE SOLVED: To provide an acoustic filter having a structure which does not affect the characteristics of the acoustic filter. SOLUTION: This acoustic filter 1 has a filter case 10 having an air pressure inlet 12, a filter cap 50 having an air pressure outlet 56 and an annular ring packing member 80 attached to this air pressure outlet 56. A welding joint structure is adopted between the filter case 10 and the filter cap 50. COPYRIGHT: (C)2003,JPO
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