ruby 8000The Ruby has a number of Harrison's own patented spring technologies including their Revolution Joey spring and HD lhtweht titanium alloy springs. This system is a effectively a smallerRUBY8000 Journal PkM-CSR menyajikan publikasi ilmiah terkini tentang Pengabdian kepada Masyarakat (PkM) dan Tanggung Jawab Sosial Perusahaan (CSR). Sumber referensi