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Rectangular steel bar stair treads give a high strength and stiffness-to-bodyweight ratio and can be obtained that has a serrated area when extra security is needed.Beton landasan steel grating (bagian kanan dan kiri) harus rata atau sama tinggi. Bagian bawah steel grating diusahakan menempel secara sempurna dengan landasan bawah.Kami memudahkan pe