... years 2. widely used for construction in tunnel, culvert,railway 3. nice performance Dry concrete shotcrete machine PZ series dry concrete ... of handling mixture, blanking delay, less remaining material, low dust, single-point compaction, easily adjustment and maintain, rubber sealing plate with long ... .5Production capacity m3/h6.07-9Cement-sand ratio-1 : 3-51 : 3-5Water-cement ratio-≤0.4-0.45≤0.4-0 ...