Laser-cutting equipment must be totally enclosed to be safe for human operators.
( ( Laser-cutting equipment ) ( ( must ( be ( totally ( enclosed ( to ( be ( safe ( for ( human operators ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Laser-cutting) (NN equipment)) (VP (MD must) (VP (VB be) (VP (ADVP (RB totally)) (VBN enclosed) (S (VP (TO to) (VP (VB be) (ADJP (JJ safe) (PP (IN for) (NP (JJ human) (NNS operators)))))))))) (. .)))
Even if the laser machine is fully contained within, there still exist some amount of risk for the workers in the close proximity.
( ( Even ( if ( ( the ( laser machine ) ) ( ( is fully ) ( contained within ) ) ) ) ) ( , ( there ( still ( ( exist ( ( some amount ) ( of ( risk ( for ( ( the workers ) ( in ( the ( close proximity ) ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (SBAR (RB Even) (IN if) (S (NP (DT the) (NN laser) (NN machine)) (VP (VBZ is) (ADVP (RB fully)) (VP (VBN contained) (PP (IN within)))))) (, ,) (NP (EX there)) (ADVP (RB still)) (VP (VBP exist) (NP (NP (DT some) (NN amount)) (PP (IN of) (NP (NP (NN risk)) (PP (IN for) (NP (NP (DT the) (NNS workers)) (PP (IN in) (NP (DT the) (JJ close) (NN proximity))))))))) (. .)))