译：GB/T 2951.6-1997 Common test methods for insulating and sheathing materials of electric cables Part 3:Methods specific to PVC compounds Section one:Pressure test at high temperature—Test for resistance to cracking

译：MT 644-1997 Pneumatic support

译：GB/T 2951.7-1997 Common test methods for insulating and sheathing materials of electric cables Part 3:Methods specific to PVC compounds Swction two:Loss of mass test—Thermal stability test

译：MT/T 647-1997 Equipment ON/OFF transducer for coal mining

译：GB/T 9711.1-1997 Petroleum and natural gas industries—Steel pipe for pipelines—Technical delivery conditions—Part 1:Pipes of requirements class A

译：MT 646-1997 Frictional metal prop

译：GB/T 3956-1997 Conductors of insulated cables

译：GB/T 2951.9-1997 Common test methods for insulating and sheathing materials of electric cables Part 4:Methods specific to polyethylene and polypropylene compounds Section two:Elongation at break after pre-conditioning—Wraping test after pre-conditioning—Wrapping test after thermal ageing in air—Measurement of mass increase Long-term stability test(Appendix A) Test method for copper catalysed oxidative degradation(Appendix B)

译：GB/T 2951.8-1997 Common test methods for insulating and sheathing materials of electric cables Part 4:Methods specific to polyethylene and polypropylene compounds—Section one:Resistance to environmental stress cracking—Wrapping test after thermal ageing in air—Measurement of the melt flow index—Carbon black and/or mineral filler content measurement in PE

译：GB/T 17049-1997 All-glass evacuated solar collector tubes