Wood can also be used percussion hammer approach, combined with positive and reverse pump to dredge;
也可用木锤敲击的方法，结合正、反转泵，使之疏通；
Our factory is specialized in producing various specifications of the medical stethoscope and percussion hammer enterprises.
本厂是专业生产各种规格的医用听诊器和叩诊锤的企业。
The percussion hammer consists of a percussion hammer body, a percussion hammer head, percussion hammer handles, an illumination light tube, a scaled rule, a U disk and a knife which are integrated.
本发明由叩诊锤主干，叩诊锤头、叩诊锤柄，照明灯筒、量尺、U盘和小刀组成为一体；
Belt Calibration checks the wire thickness, thickness found enough to make up for re-jet spray or shoveled away with a hammer percussion hollowing inspection found hollowing should re-sprayed.
用带刻度的钢针抽查厚度，如发现厚度不够，补喷或铲掉重喷，用锤子敲击检查空鼓，发现空鼓应重喷。
The DTH percussion-compact drilling is a high efficiency technology drilling in soil strata, which use the impact force produced by hammer piston to crush and compact soil.
潜孔锤冲击挤密钻进技术集冲击钻进、振动钻进及空气钻进的优点于一体，钻进效率高，成孔质量好，在土质地层钻进工程中有着广阔的应用前景。
The DTH percussion-compact drilling is a high efficiency technology drilling in soil strata, which use the impact force produced by hammer piston to crush and compact soil.
潜孔锤冲击挤密钻进技术集冲击钻进、振动钻进及空气钻进的优点于一体，钻进效率高，成孔质量好，在土质地层钻进工程中有着广阔的应用前景。
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