| 摘要 |
A hydraulic unit is provided with a housing having two planar portions neighboring at a predetermined angle between them. At least one opening is formed on each of the planar portions. For example, one opening and at least two openings are formed on the two planar portions, respectively. A protective tape is adhered to the two planar portions of the housing for covering each opening formed on each of the two planar portions. The protective tape is cut by a laser beam, for example, to be separated into at least each one of a part for covering one opening and a part for covering at least two openings.
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