介绍了一种利用杠杆机构进行由下向上冲裁和弯曲，以及利用活动凸模进行封闭形状弯曲的级进模。
A progressive die that adopting the lever mechanism to stamp upwards and bend the part and utilizing the movable punch to bend the part of close shape was introduced.
我通过使用宽角焦距应该使建筑形状弯曲到何种程度，或者如果我想避免它，使用更接近标准值乃至长焦镜头该怎么做。
How deep I should distort the building shapes by using wide angle focal length or if I should avoid it and use more close to standard values or even a telelens.
您需要考虑口袋的形状，例如对角线或弯曲口袋或垂直口袋。
You need to consider the shape of the pocket, for instance, a diagonal or curved pocket, or a vertical pocket.
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