Anchor/support bolt holes are located in base of body.
固定器/支架螺栓孔位于阀门的基座。
Forward support bolt combined with roop rock by bolting can play a roll of combined beam, which can prevent roof rock caving immediately after explosion.
超前支护锚杆锚固后与顶板岩石构成一体，这样使超前锚杆形成组合梁作用，放炮后，能够阻止顶板岩石冒落。
Though other browsers do support extensions, widgets, etc., Firefox has by far the largest selection of bolt-on features of any Web browser.
虽然其他浏览器也支持扩展，部件等，但相对来说迄今为止火狐提供了最多的选择。
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