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A trademark used for a screw with a head having two intersecting perpendicular slots and for a screwdriver with a tip shaped to fit into these slots. 菲利普斯式螺釘頭用來指有一個蓋帽和兩個垂直相交溝槽的螺釘的商標，也指一種有適郃這些溝槽尖頭的螺絲起子的商標。