深く掘削しなければならないなど、土が崩れる可能性がある場合は、 山留め（土留め）を設けなければなりません。 Whether or not You'll need a wheeled device or perhaps a mini, midi, substantial crawler or specialty, CASE excavators boast significant energy, intelligent hydraulics and unmatched dependability. Because when paydirt is at the bottom, you may’t afford to pay for to halt digging. ... https://cruzirqan.ageeksblog.com/35281261/details-fiction-and-pay-someone-to-write-my-harvard-case-study