The characters of bank - to - turn control technology determine that the btt missile ' s mathematical model having kinematical coupling , aero dynamical coupling , inertial coupling and control coupling . so the widely used stt missile ' s autopilot , which is designed to be three - channel independent ca n ' t meet the btt missile ' s control need Btt控制技术的控制特点决定了btt导弹的数学模型存在运动学耦合、气动耦合、惯性耦合和控制耦合等多种耦合因素，因此目前侧滑转弯( stt )导弹广泛采用的自动驾驶仪三通道独立设计方法已不能满足btt导弹控制系统的设计要求。
A resident in discovery bay disclosed in june 2002 that part of the land in north lantau country park had been occupied without authorisation by a developer for 20 years . it turned out that the developer concerned had in fact applied to the government in 1981 for the use of the land under a short term tenancy ( " stt " ) , but records on how the application had been handled at that time could not be retrieved due to the failure of the lands department ( " ld " ) to keep the relevant files properly . it was only in mid - 2003 that the ld wrote to request the developer concerned to lease the land under a stt 一名愉景湾居民于二二年六月揭发有发展商未经许可占用北大屿山郊野公园部分土地长达二十年，但原来该发展商于一九八一年已向政府申请以短期租约方式使用该幅土地，只是地政总署没有妥善备存有关的档案，以致未能翻查有关处理上述短期租约申请的纪录，而该署在二三年年中才去信要求有关的发展商以短期租约方式租用该幅土地。
