| 摘要 |
PROBLEM TO BE SOLVED: To provide a lift tank weighing device comprising a lift tank for reserving powder, a powder supply pipe connected to the upper part of the lift tank for supplying the powder, and a weighing apparatus for journaling and weighing the lift tank. SOLUTION: This weighing device comprises a gas shut-off valve, an expansion, and a powder shut-off valve sequentially connected to the powder supply pipe from the lift tank side, and a pressure gauge locked between the powder shut-off valve and the gas shut-off valve for measuring pressure inside the expansion.
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