This standard applies to the resistor columns in TDI series automatic voltage regulators that change resistance as the pressure changes.
JB/T 2664.1-1999 history
2010JB/T 2664.1-2010 Column with carbon resistance chips of voltage regulator.Part 1:Column with carbon resistance chips of automatic voltage regulator
1999JB/T 2664.1-1999 Column with carbon resistance chips of automatic voltage regulator