Through the filter protective soil tests and fissure self healing tests, the filter design standard of the wide grading anti seepage materials of Shuibuya Project is given.
通过反滤保土试验及冲刷自愈试验，给出了适合水布垭宽级配防渗料的反滤设计标准。
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After training, you can master the skills ofsoil dumping, backfill, digging, grading, leveling, compacting, loading and crowding.