The sound is produced in this instrument by jacks that pluck the strings, unlike in the piano, where the strings are struck by hammers.
(The sound; is produced; L:in this instrument; by jacks) (jacks; pluck; the strings) (the strings; are struck; by hammers; L:the piano)
The sound jacks the strings
is produced pluck are struck
L:in this instrument by jacks
the strings
by hammers L:the piano