automatic opening and closing fixture  自动开闭夹具

closing and opening test  投切试验

delay of opening and closing  启闭延时

double opening and closing reconstruction  二次重建; 开闭双重建

electrical opening and closing fixtures  电动开闭夹具

fire area opening and closing  均压通风

model of opening and closing  开闭模型

mold opening and closing guideway mechanism  开合模导轨机构

morphological opening-and-closing operation  形态学开闭运算

multiple opening-and-closing plankton sampler  复式开闭浮生物采样器

Nansen opening-and-closing net  南森开团式网

opening and closing by reconstruction  开闭重建

Opening and closing ceremonies  开闭幕式

Opening and closing ceremony  开闭幕式

Opening and Closing Mechanism  开闭机构

Opening and closing motion  分合闸

Opening and closing of furnace cup  炉盖启闭

opening and closing of mold guide agencies  开合模导轨机构

opening and closing operation of reconstruction  开闭重构