ly ▁to ▁Kl ö ck ner ▁Werke ▁AG , ▁as ▁a ▁subs idi ary . ▁In ▁ 1 9 3 8 , ▁after ▁a ▁deal ▁with ▁Kl ö ck ner ▁Werke ▁AG , ▁the ▁company ▁changed ▁their ▁name ▁to ▁Kl ö ck ner ▁H umb old t ▁De utz ▁AG . ▁ ▁In ▁the ▁spring ▁of ▁ 1 9 6 9 , ▁the ▁plant ▁construction ▁division ▁was ▁extended ▁through ▁the ▁ac quisition ▁of ▁a ▁majority ▁holding ▁in ▁West fal ia ▁D inn end ahl ▁Gr ö ppel ▁AG ▁( W ed ag ) ▁of ▁Bo ch um . ▁Further ▁in ▁ 1 9 7 2 , ▁Wed ag ▁and ▁H umb old t ▁merged ▁to ▁become ▁K HD ▁Indust rie an lagen ▁AG . ▁ ▁In ▁ 1 9 8 8 , ▁after ▁economic ▁problems ▁caused ▁by ▁mis jud g ments ▁and ▁bad ▁invest ments ▁combined ▁with ▁an ▁unf avor able ▁economic ▁climate , ▁the ▁K HD ▁group ▁began ▁a ▁radical ▁rest ruct uring ▁based ▁on ▁strateg ic ▁business ▁units , ▁with ▁K HD ▁AG ▁continu ing ▁to ▁operate ▁as ▁a ▁man aging ▁holding ▁company . ▁The ▁group ▁began ▁showing ▁a ▁profit ▁in ▁ 1 9 8 9 . ▁ ▁In ▁ 1 9 9 3 , ▁K HD ▁H umb old t ▁Wed ag ▁acquired ▁Z AB ▁Z ement an lagen ▁und ▁Mas ch inen bau ▁GmbH . ▁ ▁Later ▁in ▁ 2 0 0 5 ▁the ▁company ▁was ▁acquired ▁by ▁M FC ▁Ban cor p ; ▁after ▁its ▁successful ▁recovery ,