sentences:  A number of smaller pressurized sections will be adjunct to them (Soyuz spacecraft (permanently 2 as lifeboats – 6 months rotations), Progress transporters (2 or more), the "Quest" and "Pirs" airlocks, as well as periodically the H-II Transfer Vehicle).The ISS, when completed, will consist of a set of communicating pressurized modules connected to a truss, on which four large pairs of photovoltaic modules (solar panels) are attached.The pressurized modules and the truss are perpendicular