| 摘要 |
PCT No. PCT/DE88/00347 Sec. 371 Date Nov. 22, 1989 Sec. 102(e) Date Nov. 22, 1989 PCT Filed Jun. 10, 1988 PCT Pub. No. WO88/09860 PCT Pub. Date Dec. 15, 1988.To simplify the fabrication of the housing of an automatic door closing device with hydraulic damping, it is proposed to configure the housing as a tubular hollow cylinder 106 on which, externally, by means of one or more compactly superimposed covering elements 102, a bypass valve 121 is formed. |
