This tester is suitable to measure accuracies of pitch deviation with inside and outside straight helical circular gear among seventh degree. Easy to operate and maintenance.

适用于检查7级或低于7级精度的内外齿合直齿与斜齿圆柱齿轮的周节偏差。操作简便，易于维修，可供各工厂计量室及车间使用。

youdao

Oooooh Dobriskey slips into seventh gear, moves up the outside and cruises down the straight to qualify comfortably.

BBC: World Championships day seven as it happened

Seventh seed Djokovic, 19, stepped up a gear at the start of the deciding set while Federer struggled with his forehand.

BBC: SPORT | Tennis | Nadal loses to Youzhny in Dubai