Tracing the identities of those who post such illicit material on social-networking sites, mostly based overseas, may prove impossible.
许多此类社交网站的据点在国外，追踪这些不实信息发布者的身份几乎不可能。
On the base of the constant removal rate of the metal material, the motion model of tangential point tracing grinding of Non-round parts should be given respectively according to type of the parts.
基于恒金属去除率的原则，根据零件的特点分别建立了非圆零件切点跟踪磨削的运动模型。
The program allows tracking, tracing, storage and analysis of all supply chain data, including material flow, quality, ore type and other information.
程序允许跟踪，存储和分析所有供应链数据，包括物料流动、质量、矿石类型和其它信息。
Heating cable length should be piping distribution side of the material in the cable at the cooling condensation unaccompanied heat, heat tracing cable length should be longer than the heating pipes.
伴热电缆应按管道长度分布，一面物料在无伴热电缆处降温凝结，伴热电缆的长度应长于被伴热管道。
Heating cable length should be piping distribution side of the material in the cable at the cooling condensation unaccompanied heat, heat tracing cable length should be longer than the heating pipes.
伴热电缆应按管道长度分布，一面物料在无伴热电缆处降温凝结，伴热电缆的长度应长于被伴热管道。
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