选控 meaning in Chinese

cause-selecting

4 . the specially designed side lasting mechanism is formed by each 5groups of pu fasteners on its right and left side . each last 3 groups of pu fasteners can be used optionally according to the size of shoes
4 .特别设计的中帮机构，由左右各五组pu束带组合，后三组并可针对鞋型大小号选控使用或不使用。
Each set of pincers has the function of in depen dently automatic pull - down . according to the elasticity of upper , operator can control to pull down any certain pinces , whose depth can be adjusted subject to individual requests
每组爪子具独立式自动下拉功能，操作者可视鞋面之松紧度，选控需要之爪子作自动下拉动作，而下拉深度可视需要调整。