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Due to the national holidays as Golden Week, we will close 2018/4/28~2018/4/30 and 2018/5/3~2018/5/6.
This may cause delays with our responses. Thank you for your understanding.
Drilled holes in the concrete structure roads, dams, tunnels, bridges, civil engineering, etc., and collecting core for strength test (test piece). Drilling for construction work of air conditioner, electricity, gas, water pipe, phone, etc. Chemical ancho
