以上来源于: WordNet
The main difficulty is that the bending must be carried out along all lines of complex-shaped marking-out at a time.
其主要难点在于,必须实现沿复杂的展开图上所有的画线同时弯曲。
The utility model discloses a frame marking-out positioning device, and belongs to the technical field of location and installation of products.
车架画线定位装置涉及一种画线定位装置,属于产品安装定位技术领域。
They also have to be certified as IELTS examiners after carrying out some trial marking and receiving training.
他们还得进行试验性评分并接受了培训后才能合格。
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