本发明一种风机蜗壳整体拉深工艺，包括以下步骤：将拉深钢板剪成所需 的尺寸片料；

The invention relates to an overall deep drawing technology of a scroll casing of a blower, including the following steps: a steel plate for deep drawing is cut into sheets with a required size;

youdao

本发明一种风机蜗壳整体拉深工艺，包括以下步骤：将拉深钢板剪成所需 的尺寸片料；

The invention relates to an overall deep drawing technology of a scroll casing of a blower, including the following steps: a steel plate for deep drawing is cut into sheets with a required size;

youdao