它能保护门制动器不被破坏，弄脏，或随意调整。
The cover helps protect the door closer from vandalism, dirt, and unauthorized adjustment.
不得随意调整电控柜内的器件，不得随意把工具、铁丝等杂物放入电控柜或机器上。
It is not allowed to modify devices inside the electrical cabinet, or to place tools, iron wires, and other sundries on the electrical cabinet, or on the machine.
提供一种由使用者根据口腔内侧齿缝位置或距离，可随意调整弯曲角度的牙签。
The utility model provides the toothpick capable of adjusting the bending Angle freely by a user according to the gash position or distance at the inner side of a mouth.
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