Txij Nkawm:
Thruster nruas brakes muaj cov electro-hydraulic actuator / Thruster thiab kev txav. Thrusters tuaj yeem kho rau tus nqi pheej yig thiab rov ua dua tshiab rau "xws li tshiab" mob. Nkawm khau tuaj yeem yog sib raug zoo, thiab kev txav yuav nyob ntev thiab yuav xav tau kev rov qab muaj dua nyob rau lub sijhawm. Zuag qhia tag nrho, Thawv crane brakes, thiab ntau ntxiv.
