China supports and has participated constructively in the negotiation of an international instrument on identification and tracing of illicit small arms and light weapons (SALW).
中国支持并积极参与有关“识别和追查非法小武器”国际文书的谈判。
2
Based on the plant fuild properties and the job site weather condition, tracing is not required for instrument and measuring piping.
根据本装置仪表所测物料的特点及当地气候条件，仪表及测量管路不需伴热。
3
The extra low electromagnetic wave, wavelet technology, pipe track instrument, DGPS and tracing signal equipment are used to solve the key question of trans-mit-receive and communication.