| 释义 |
ring gate ring gate[′riŋ ‚gāt] (civil engineering) A type of gate used to regulate and control the discharge of a morning-glory spillway; like a drum gate, it offers a minimum of interference to the passage of ice or drift over the gate and requires no external power for operation. (engineering) An annular opening through which plastics enter the cavity of an injection or transfer mold. |