求翻译：采购数量：甲方每月稳定地从乙方采购恒粘橡胶TSR CV60产品，每月采购数量： 100 吨。甲方采购数量若有变动，甲方提前30天以书面方式通知乙方是什么意思？

Purchase Quantity: Party steady monthly purchase from Party B constant viscosity the rubber tsr cv60 products, monthly purchase quantity: 100 tons. The Party A procurement are subject to change in the number of Party 30 days prior written notice to Party B

Purchase Quantity per month: Party a steady from Party B purchase hang adhesive rubber TSR CV 60 products per month, purchase quantity: 100 tons. Party a purchase quantity if it changes, and party a 30 days in advance in writing Party B

Purchase quantity: The party of the first part each month purchases stably from the second party sticks rubber TSR permanently the CV60 product, each month of purchase quantity: 100 Ton.The party of the first part purchases quantity if has the change, the party of the first part ahead of time 30

Purchase amount: the party a monthly stable procurement from party b viscosity rubber TSR CV60 monthly purchase amount: 100 tons. Customer purchase quantities are subject to change, the party 30 days written notice in advance b

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