預鑄陰井. 0. 1. 寬50x長50x深70cm. 2. 寬60x長60x深90cm. 3. 寬80x長80x深100cm. 4. 寬100x長100x深140cm. 3. L1型預鑄溝蓋板. 0. 4. L2型預鑄溝蓋板.
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