Three-dimension, micrometer, electronic caliper, depth gauge, height gauge, calibration, UV energy meter, RCA abrasion tester, infrared ray temperature tester, four-color light box, hardness and adhesion tester, leakage current tester, LCA digital bridge, frequency signal emitter, infrared ray decoder, full-automatic remote control tester, multimeter, chromatographic analyzer; pressure-resistant tester, high and low temperature test box, capacitance tester, electrostatic tester, temperature tester, torsion tester.