| 摘要 |
PCT No. PCT/EP92/00539 Sec. 371 Date Feb. 15, 1994 Sec. 102(e) Date Feb. 15, 1994 PCT Filed Mar. 10, 1992 PCT Pub. No. WO93/01434 PCT Pub. Date Jan. 21, 1993.A check valve with a housing having a valve seat, a valve closing member cooperating with the valve seat and an upstream dirt trapping filter, particularly for sanitary water fittings, wherein the dirt trapping filter and housing are of a unitary construction.
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