Ngokuvamile, isivuno semfucumfucu esicutshungulwe sibe ngamatshe singama-80-90%, okungukuthi, ithani elilodwa lemfucumfucu lingaphula amathani angama-0.8-0.9 amatshe, ngoba izici zemfucumfucu ezindaweni ezahlukene zihlukile, njengokuthi: i-viscosity, okuqukethwe kwempushana. Inani, umswakama, njll., uma umhlabathi nokungcola kuhambisana...
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