由于经济效益（或硬性价值）具有定量性质，非经济效益（或软性价值）具有定性性质，因此物业管理服务产品价值是一个灰色值。
PMSP value is a Grey Value, because economy effectiveness (or hard value) is of quantitative character while non-economy achievements (or soft value) is of qualitative character.
目的探讨骨膜硬性纤维瘤的X线诊断价值及在鉴别诊断中的意义。
Objective To discuss the value of X-ray diagnosis for desmoplastic fibroma of periosteum and significance in differential diagnosis.
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