JP2530452C - - Google Patents
Info
- Publication number
- JP2530452C JP2530452C JP2530452C JP 2530452 C JP2530452 C JP 2530452C JP 2530452 C JP2530452 C JP 2530452C
- Authority
- JP
- Japan
- Prior art keywords
- cutter
- gravel
- cylindrical
- disk
- cone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000009412 basement excavation Methods 0.000 description 14
- 239000004576 sand Substances 0.000 description 8
- 239000013049 sediment Substances 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000009933 burial Methods 0.000 description 2
- 230000009194 climbing Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Family
ID=
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