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China has a large number of various shooting ranges that are widely distributed throughout the country.
In a shooting range with service life for 30 years, about 5%~10% of lead is combined with soil grains (≤2mm) (Astrup, Boddum et al. 1999), which is equivalent to the corrosion speed of this shooting range.

The EVOH plate was cut into 10 mm × 10 mm square substrates, abraded on one side (which became the top surface) with SiC abrasive paper (average grain size=7.6 μm), ultrasonically washed, and then dried in a vacuum for 24 h.
With the laser power lower than 3 W, the laser ablation on the EVOH surface was likely to be insufficient to provide an adequate number of nucleation sites to form a contiuous CaP layer.

Anti-phase boundaries are planar defects formed at the geometrical separation of two 3C-SiC grains differing one from each other by a 90° rotation in the Si(100) growth plane.
These anti-phased domains (APDs) are formed by the presence of steps on the Si surface, these steps being constituted by an odd number of Si atomic steps.

Recycled aggregate: it is from scrap concrete which is produced from some servicing pavement in speedway, which is produced as midding shivers by hand breaking, and then small grain by jaw crusher.
Table 3 Recycled aggregate concrete wear-resisting property and strength test results Number Mineral additive replacement（%） Compression strength / flexural strength Abrasion value，kg/m2 FA SG SF CFG CFS CFGS 3d /MPa 28d /MPa 3d 28d 1 0 0 0 0 0 0 31.2/3.54 54.6/5.65 4.62 4.08 2 20 28.9/3.44 58.5/5.87 4.77 3.58 3 30 25.6/3.21 61.2/5.74 4.81 3.44 4 40 22.5/2.95 57.8/5.61 5.02 3.36 5 20 33.2/3.55 60.3/6.09 4.78 4.17 6 30 31.2/3.51 63.5/6.18 5.04 4.31 7 40 29.5/3.40 61.2/5.97 5.32 4.54 8 5 32.3/3.71 55.1/5.70 4.72 3.75 9 10 34.1/4.01 55.8/5.89 4.83 3.56 10 15 37.8/4.34 58.3/5.99 4.8 3.57 11 30 33.4/3.49 56.3/5.66 4.66 3.87 12 30 40.2/4.26 65.1/6.42 3.69 3.02 13 30 36.5/3.67 58.0/5.88 4.05 3.57 Note: The sample size for compression strength test are100 mm×100 mm×100mm, and flexural strength is converting into the strength of standard specimen.

Grinding changed grain size due to mechanical forces exposure.
Moreover, few numbers of new peak also developed due to the treatment given.

Fig. 3(a) shows that the presence of Si colonies (particles) existing on the grain boundaries of the Al matrix.
Acknowledgement This study was supported by “The Scientific and Technological Research Council of Turkey (TÜBİTAK)” with the project number of 214M093.

For the same input of particle mass flow rate, smaller particles might cause a lower impact concentration (the number of repeated hits on the same place) as the impact area is larger [14].
Solid Particle Erosion Caused by Rice Grains.

After adding the mud with large grains such as walnut shells, drilling was resumed.
Large numbers of grayish green and red brown mudstones were circulated out.

The crack growth length was calculated by the numbers of damaged regular elements.
Needleman, Creep crack growth by grain boundary cavitation under monotonic and cyclic loading, J.

The composition of clinoptilolite corresponds to the formula: 0.2Na2O∙0.26K2O∙0.43CaО∙0.2MgО∙9.57SiO2∙Al2O3∙0.09Fe2O3 The natural clinoptilolite sample, with an average grain size of 0.25 mm (sample 1), was activated over the course of a day using a 5% HCl solution (sample 2) and a 25% H2SO4 solution (sample 3), maintaining a solid-to-liquid phase ratio of 1:10.
Thermal analysis data confirm the presence of a greater number of sorption centers in activated clinoptilolite samples.