The lower ends of the water filling pipe and the seed discharging pipe are fixed in the two parallel holes of the perforator, and the upper parts are connected by connecting sheets.
注水管和下籽管的下端固定在打孔器的两平行孔内，上部由联接片相联；
Two parallel rows of connection holes on a PCB. Also, the type of connector used with this array.
在PC B上的两排平行的连接洞。此外，这类型连接器用这使用阵列。
Holes in parallel between the degree of error will affect the quality of the meshing gears.
孔系之间的平行度误差，会影响齿轮的啮合质量。
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