... hand, clenching the sheath by your left hand, pull out at the same time of turn the sheath, ... position "0" can be manually reset, otherwise pull the spanner will automatically make the safety switch in ... position"0";See figure 2.3. Slowly pull the spanner until max limit (meantime, the safety ... cannula and obturator in unloaded status, repeat the pull operation until the needle loaded;See figure 3.4 ...