Level A1 : READ LISTEN TRANSLATE RANDOM
Level A2 : READ LISTEN TRANSLATE
Level B1 A: READ LISTEN TRANSLATE
Level B1 B: READ LISTEN TRANSLATE

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dowel Dübel deuvel goujon tassello clavija เดือย chốt hạ 销钉
gusset Zwickel kruisje soufflet tassello escudete เป้าเสื้อกางเกง gusset 扣板

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Compounds:

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HSK5000 A1+A2+B1

HSK5000 B2 + C1