| 摘要 |
PROBLEM TO BE SOLVED: To suppress the scattering to the outside of a spraying part and the generation of a large amount of rebound to significantly save cost shortage caused by the rebound that was considered to be necessary in the past by attaining the suppression of diffusing angle of compressed air and the reduction in ejecting rate of mortar. SOLUTION: This nozzle comprises a depressurizing chamber cylinder 6 extended in section in Fig. 2 and a hole or space 5 extending from the inside to the outside to reduce the internal pressure of the nozzle.
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