трубопроводостроительном

тру — Open syllable, initial syllable, stressed in some forms of the root word.. бо — Open syllable, vowel reduction common in unstressed position.. про — Open syllable, vowel reduction common in unstressed position.. во — Open syllable, vowel reduction common in unstressed position.. до — Open syllable, vowel reduction common in unstressed position.. стро — Open syllable, consonant cluster at the beginning.. и — Closed syllable, vowel is stressed.. тель — Closed syllable, palatalization of 't'.. ном — Closed syllable, final syllable.