ZQST-30-2.5 type pneumatic coal injection (rock) diamond drill soft rock drilling machine wet drilling clean coal custom brand models ZQST30 / 2.5 type alias wind coal drilling water use wet drilling motor power 3.0 is mainly used Drill holes in the coal mining operations in the coal Φ35- Φ45. Can also be used for drilling soft rock. During drilling water directly reduce coal dust, dust hazards for operators. For more information please contact: Business Contact: Mengyue Fei Contact phone: 18660761686 Business Want: zhongmei0326 business QQ: 2247579936 E-mail: zhongmeixz@163.com Company website: www.zhongmeigk.com.cn/ Address: Jining City, Shandong Province Torch High-tech Zone No. 69 Road