PSAC member companies represent over 80 per cent of the business volume generated in the petroleum services industry. 球狀活性炭的成員公司代表超過百分之八十的業務量中產生的石油服務行業。
A flexible budget is also called a variable budget because it shows how revenues and costs vary with volume throughout the budget range. 彈性預算也叫變動預算，因其表明了收入及費用如何隨預算範圍內的業務量變動而變動的情況。
PSAC member companies represent over 80 per cent of the business volume generated in the petroleum services industry. 球狀活性炭的成員公司代表超過百分之八十的業務量中產生的石油服務行業。
A flexible budget is also called a variable budget because it shows how revenues and costs vary with volume throughout the budget range. 彈性預算也叫變動預算，因其表明了收入及費用如何隨預算範圍內的業務量變動而變動的情況。
