The disadvantage of this kind of machine is that it makes seams that are not as secure as the lockstitch; in addition, the appearance of the seam from the top and bottom of the fabric is different.
( ( ( ( ( ( The disadvantage ) ( of ( ( this kind ) ( of machine ) ) ) ) ( is ( that ( it ( makes ( seams ( that ( ( are not ) ( as ( secure ( as ( the lockstitch ) ) ) ) ) ) ) ) ) ) ) ) ; ) ( ( in addition ) ( , ( ( ( the appearance ) ( of ( ( the seam ) ( from ( ( the ( ( top and ) bottom ) ) ( of ( the fabric ) ) ) ) ) ) ) ( is different ) ) ) ) ) . )
(ROOT (S (S (NP (NP (DT The) (NN disadvantage)) (PP (IN of) (NP (NP (DT this) (NN kind)) (PP (IN of) (NP (NN machine)))))) (VP (VBZ is) (SBAR (IN that) (S (NP (PRP it)) (VP (VBZ makes) (NP (NP (NNS seams)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (RB not) (ADJP (RB as) (JJ secure) (PP (IN as) (NP (DT the) (NN lockstitch))))))))))))) (: ;) (S (PP (IN in) (NP (NN addition))) (, ,) (NP (NP (DT the) (NN appearance)) (PP (IN of) (NP (NP (DT the) (NN seam)) (PP (IN from) (NP (NP (DT the) (NN top) (CC and) (NN bottom)) (PP (IN of) (NP (DT the) (NN fabric)))))))) (VP (VBZ is) (ADJP (JJ different)))) (. .)))
This machine makes seams that aren't as secure as the lockstitch.
( ( This machine ) ( ( makes ( seams ( that ( ( are n't ) ( as ( secure ( as ( the lockstitch ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This) (NN machine)) (VP (VBZ makes) (NP (NP (NNS seams)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (RB n't) (ADJP (RB as) (JJ secure) (PP (IN as) (NP (DT the) (NN lockstitch))))))))) (. .)))