... direct-operated relief valve 直接作用式安全阀 21世纪 教育网 directing plate引导板 direction finder 测向仪 ...
双语例句
1
Nautical A vertically hinged plate of metal, fiberglass, or wood mounted at the stern of a vessel for directing its course.
垂直的有铰链的圆盘，用金属、玻璃纤维或木头制成，置于船头之上以调整方向。
2
The choice of right template, the mechanism of tem- plate, the structure-directing role of template and its effect on the pore size of titanosilicate sieves are also discussed.