PSAC member companies represent over 80 per cent of the business volume generated in the petroleum services industry. 球状活性炭的成员公司代表超过百分之八十的业务量中产生的石油服务行业。
A flexible budget is also called a variable budget because it shows how revenues and costs vary with volume throughout the budget range. 弹性预算也叫变动预算，因其表明了收入及费用如何随预算范围内的业务量变动而变动的情况。
PSAC member companies represent over 80 per cent of the business volume generated in the petroleum services industry. 球状活性炭的成员公司代表超过百分之八十的业务量中产生的石油服务行业。
A flexible budget is also called a variable budget because it shows how revenues and costs vary with volume throughout the budget range. 弹性预算也叫变动预算，因其表明了收入及费用如何随预算范围内的业务量变动而变动的情况。
