question: Name the ply uk, nz, au for wraps per inch 7 wpi
answer: SELECT ply__uk, _nz, _au_ FROM table_20297668_1 WHERE wraps_per_inch__wpi_ = "7 wpi"
context: CREATE TABLE table_20297668_1 (ply__uk VARCHAR, _nz VARCHAR, _au_ VARCHAR, wraps_per_inch__wpi_ VARCHAR)