Supply pipe shed hollow bolt manufacturers Luoyang River Thai Technology Co., Ltd. sincerely look forward to your call, guaranteed to give you the most satisfied with the service and price are welcome to visit the large diameter pipe shed, shed 76, 108 bassoon shed, shed large tunnel diameter pipe roof structure of the large-diameter pipe roof made of high quality steel roll tied the whole thread-like rod, equipped with nuts, arched plate, just plug and alloy drill slurry composition. Threaded bolt body: Length international standard waveform continuous thread, easy to install drill, link sets, tighten the nut; and can be cut and connected longer. Nuts: rock stress can concentrate delivered to the pad. Arch pad: can withstand greater stress surrounding rock. Pulp tampon: make grouting to maintain a certain pressure to sufficiently fill the void surrounding rock. Connected sets: the tube can shed while drilling extended to a depth of design. Alloy drill: a strong penetrating power, so that the tube can pass through all kinds of roof rock.