FX16-21S-0.5SV 原装 FX16-21S-0.5SV(30) FX16-31P-0.5SD FX16-31P-0.5SDL FX16-31P-GND FX16-31P-GND(A) FX16-31P-GNDL FX16-31P-GNDL(A) FX16-31P-HC FX16-31S-0.5SH