Ishikawajima-Kenzai Kogyo Co., Ltd.

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Core for use in casting hollow concrete slab and method of casting...
- Patent number 4,342,441
- Issue date Aug 3, 1982
- Ishikawajima-Kenzai Kogyo Co., Ltd.
- Isao Maebara
- B28 - WORKING CEMENT, CLAY, OR STONE

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