In this period, a number of key technological changes  sewing machines that made many more stitches a minute, long knives instead of shears for cutting, and pressing machines.
( ( In ( this period ) ) ( , ( ( ( a number ) ( of ( ( key ( technological changes ) ) ( sewing ( machines ( that ( ( ( ( made ( many ( more stitches ) ) ) ( a minute ) ) , ) long ) ) ) ) ) ) ) ( ( knives ( instead ( of ( shears ( for ( ( ( cutting , ) and ) ( pressing machines ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT this) (NN period))) (, ,) (NP (NP (DT a) (NN number)) (PP (IN of) (NP (NP (JJ key) (JJ technological) (NNS changes)) (VP (VBG sewing) (NP (NP (NNS machines)) (SBAR (WHNP (WDT that)) (S (VP (VBD made) (NP (JJ many) (JJR more) (NNS stitches)) (NP (DT a) (NN minute)) (, ,) (ADVP (RB long)))))))))) (VP (VBZ knives) (PP (RB instead) (IN of) (NP (NP (NNS shears)) (PP (IN for) (S (VP (VP (VBG cutting)) (, ,) (CC and) (VP (VBG pressing) (NP (NNS machines))))))))) (. .)))
Industry tools and machineries have stayed the same until today.
( ( Industry ( ( tools and ) machineries ) ) ( ( have ( ( stayed ( the same ) ) ( until today ) ) ) . ) )
(ROOT (S (NP (NN Industry) (NNS tools) (CC and) (NNS machineries)) (VP (VBP have) (VP (VBN stayed) (NP (DT the) (JJ same)) (PP (IN until) (NP (NN today))))) (. .)))