所有的脚手架支柱、 支架或上部构件都必须垂直并牢固拉撑，以防摆动和位移。
All poles, legs, or uprights of scaffolds shall be plumb and rigidly braced to prevent swaying and displacement.
永久磁铁和动触头固定在摆动板上，摆动板可偏转，顶端通过弹簧吊置在线圈支架上。
A permanent magnet and a moving contact are fixed on a swing plate which can deflect, and the top end of the swing plate is hung on a coil brace through a spring.
一种幼儿用摇摆设备包括支撑于地面的第一支架、供安装座椅的第二支架、和连接第一支架与第二支架的摆动装置。
The swing equipment for infants comprises a first stand supported on the group, a second stand for arranging a seat, and a swing device connected with the first stand and the second stand.
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