Putanga 1: Ka whakatauhia e te magnetometer te aronga o te āpure whakauru, e hangaia ana hei whakatau i te tuaka hurihuri. Putanga 2: Ka whakatauhia e te magnetometer te aronga o te āpure i hangaia, ka whakauruhia hei whakatau i te tuaka hurihuri. Pātai: He ōrite te tikanga o te rerenga 1 me te rerenga 2? He Ae, he Kore rānei?
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