Measuring instrument for vibration measuring; Measuring instrument, namely, shock control measuring instruments for products in automobile, aviation, spaceflight, electronics, transportation and communication; Measuring instrument, namely, salt fog test measuring instruments for products in chemical engineering, ships, electronics and metering devices; Testing instruments and machines, namely, freely-drop tester for testing products in home electrical appliances, metering devices, packaging, communication equipment; Testing instruments and machines, namely, simulating of transportation tester for testing products in home electrical appliances, aviation, spaceflight, weapons; Testing instruments and machines, namely, high and low temperature control tester; Testing instruments and machines, namely, salt fog tester for testing products in aviation, ships, spaceflight, electronics, chemical engineering and metering devices