頂部張緊立管（TTR）是用於連線運動的浮式生產設施和海床上的海底系統的管道，頂部張緊立管可用於鑽井、完井及生產。
The NHTSA (National Highway Traffic Sefety Administration) has suggested the 'TTR' method as one means of regulating the roll stability properties of light trucks and utility vehicles.
美國公路交通安全域性建議‘TTR’法為規定用於輕型貨車和輕型箱式越野車側翻穩定*試驗的一種方法。
Comparison of TTR and CMV Promoters in vivo and in vitro via a Secreted Luciferase Reporter System
