用于PosiTest HHD的杆有 13 厘米（5 英寸）和 50 厘米（20 英寸）可供选择
127毫米（5英寸）电极杆
50厘米（20英寸）电极杆
替换电极杆拇指螺丝（3包）
PosiTest HHD
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