Strain control wrapup and unreeling , interlayer unreeling automatic strain control .

收放卷、夹层放卷全自动张力控制。

Each tiny satellite is to simulate the basic interaction between an electric field and surrounding charged particles by unreeling a short , high-voltage wire tether into the plasma of earth 's ionosphere to measure any electrostatic forces that develop , janhunen says .

janhunen说，每一个小卫星将在等离子层展开高压电线来测算库仑力，进而模拟电场和周围粒子的基本作用。