The formula for calculating included angle between polufamily plane traces of lattice systemsin thin foit under hath zero tilt and non-zero tilt states was deduced and verified by certainprat tical examples.The method may be available to index the plane traces of slip.twin andother defects.especially to determine such planar defects as twin
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机译：metodi microbiologici Tradizionali e metodi moleculeolari per l'analisi degli integratori alimentari a base di o con probiotici per ujso umano（microbiological and molecular methods for analysis of probiotic Based Food supplements for Human Consumption）。
