Sulfur contamination may retard the setting reaction ofwhich ofthe following impression materials()
Agar hydrocoUoid
B. Polyether
C. Alginate
D. Addition silicone
冷轧厂1780机组酸洗线拉伸矫直机为()弯()矫式,其工作辊直径为80mm。
AMF的含义是:()。
A. 秒流量控制
B. 扩展秒流量控制
C. 自动速度控制
D. 前馈控制
Dental impression compound is known as a/an()
A. chemoplastic material
B. irreversible material
C. hvdroelastic material
D. thermoplastic material