CREATE TABLE table_20297668_1 (ply__uk VARCHAR2, _nz VARCHAR2, _au_ VARCHAR2, wraps_per_inch__wpi_ VARCHAR2)

Name the ply uk, nz, au for wraps per inch 7 wpi
SELECT ply__uk, _nz, _au_ FROM table_20297668_1 WHERE wraps_per_inch__wpi_ = "7 wpi"
SELECT "ply__uk", "_nz", "_au_" FROM "table_20297668_1" WHERE "7 wpi" = "wraps_per_inch__wpi_"