[lemma=technique] (□ □)? □ □
[lemma=technique] ([□] □)? □ □
[lemma=technique] (□+ □)? □ □
While Avary handles this opening fairly well , he then grates on the nerves by using the rewind technique a fourth time , going back a whole season while the credits roll . As an experienced blind bowler I had used that guidance technique a few times in the past when a standard American guide rail was not available , but , in Finland as at other times , I did not bowl as well as I generally do while using a guide rail . The accuracy of a resulting DTM is about 0.9m and it is hoped that further improvements will make this technique a cost-effective alternative to ground-based topographic recording .