环料的材料消化率(环料变形基因)
loop materials digestibility
不锈钢扁线及半圆线常用材料
Commonly used materials for Stainless Flat Wire & Half Round Wire
材料的选择与应用
selection and application
常用材料
common material
materials used for naval vessels
承压设备常用材料
pressure equipment materials
承压用材料
material for pressure purpose
船用材料纳期管理
shipbuilding material′s reserve date management