metal penetration造句

• Foot and leg protectors - requirements and test methods for toecaps and metal penetration resistant inserts
  腿脚保护物.脚趾套和抗金属刺入插入物的要求和试验方法
• Foot and leg protectors . requirements and test methods for toecaps and metal penetration resistant inserts
  脚和腿的保护装置.鞋头和防金属粘砂嵌入物的要求和试验方法
• Foot and leg protectors - requirements and test methods for toecaps and metal penetration resistant inserts ; german version en 12568 : 1998
  脚腿防护装置.脚趾罩和防金属穿透的保护衬垫的要求和
• It is necessary coal dust to inspect and evaluate comprehensively all physical - chemical properties of the coal dust , as well as to determine its anti - metal penetration ability by pouring a test specimen
  选择煤粉应通过全面的检测和评价各项理化指标，并通过试块浇注试验以确定其防粘砂能力。
• An introduction was made to the dry distillation process of coal , anti - metal penetration mechanism of coal dust and influences of various physical - chemical properties of coal dust on its anti - metal penetration ability , view points on coal dust choice and choice methods
  摘要介绍煤的干馏过程、煤粉在型砂中的防粘砂机理和煤粉的各项理化指标对其防粘砂能力的影响，以及选择优质煤粉的观点和方法。