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OKA Engineering & Trading Sdn. Bhd. Manufacturer of various concrete building products such as: concrete spigot socket pipe, telecom manhole, supersize box culvert, L-shape retaining wall, porous sub-soil pipes, precast drains, concrete septic tanks, concrete pipes, box culverts, prestressed and RC concrete piles, readymixed concrete, etc. Malaysia T Type Block International, Inc. TBI retaining wall systems : (High-T wall, Front-Tension wall, Free-Planting wall) Japan |