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- WK4310 : 20 Hz ~ 100 kHz
- WK4320 : 20 Hz ~ 200 kHz
- WK4350 : 20 Hz ~ 500 kHz
- WK43100 : 20 Hz ~ 10 MHz
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- WK6505P : 20Hz ~ 5MHz
- WK6506P : 20Hz ~ 6MHz
- WK6510P : 20Hz ~ 10MHz
- WK6515P : 20Hz ~ 15MHz
- WK6520P : 20Hz ~ 20MHz
- WK6530P : 20Hz ~ 30MHz
- WK6550P : 20Hz ~ 50MHz
- WK65120P : 20Hz ~ 120MHz
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