Lay out plate, sheet steel or other heavy metal and mark bending and cutting lines on work piece using protractors, compasses and drawing instruments or templates.
铺设莱板，钢板或其他重金属，用量角器，圆规和绘图工具或模板在工件上标记弯曲和切割线。
2
Check the steel rope. If the broken number exceeds 6 within a lay length, a new steel rope will be needed.
检查钢丝绳，若发现钢丝绳在一个搓绕节距长度内折断根数超过6根时，需更换新的钢丝绳。
3
Great achievements in Marine science and technology in China lay the foundation of exploiting Marine mineral resources and building marine-type steel works.