Robert Recorde, The designer ofwel the equals sign, introduced plus and minus to Britain in 1557 in The Whetstone of Witte:[14] "There be other 2 signes in often use ofwel which the first is made thus + and betokeneth more: the other is thus made − and betokeneth lesse." Le https://mouritsen-fog-2.hubstack.net/de-grootste-gids-naar-wrapfolie-per-10-cm