Est ce que Cath peut voler à mon secours pour traduire l'explication de la chaine de base du modèle Berroco

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J'ai compris les explications pour les ronds mais voila 2 fois que je refais ma chaine car elle tourne !!
Double Base Chain: With crochet hook, ch 2; insert hook into 2nd ch from hook (the first ch made) and work 1 sc; * insert hook into single vertical thread forming the LH side of the previous sc and work another sc. Rep from * until ch measures 19”.
Row 1: Ch 5, dc in 6th ch from hook, * ch 1, skip 1 ch, dc in next ch, rep from * across. Turn.
Row 2: Ch 1, work 2 sc in each ch-1 space across. Fasten off.
Merci !!!!!!