11. They contributed an additional $ 10, 000 for structural modifications to house the pipe chambers. 12. Recurrent structural modifications over the years have reflected Presidential management style, changing requirements, and personal relationships. 13. It is only done once unless major repairs or structural modifications are done to the ship. 14. Different chemical or structural modifications may be made to alter the cutting properties of the abrasive. 15. Boeing will handle major structural modification design. 16. They will be sent to Russia, where a new high-powered engine will be installed after structural modification . 17. No more than his predecessor had, Louis XVI brought no structural modifications to the " Grand Trianon ". 18. Her three-bladed screws were replaced with four-bladed ones, and structural modifications were made to her lower aft section. 19. The bridge presents the clearest, most original structure of its type, as the others incorporate significant structural modifications . 20. Repairs and structural modifications have been made to turn the bridge into what is now a pedestrian walkway.
