an infrequent guest稀客Some words are too infrequent to be worthy of inclusion in the dictionary.一些单词的使用频率太低,没有必要收入词典。Barriers between nations are reared by slow and infrequent communication.国与国之间的隔阂是由沟通缓慢而又太少形成的....John...
All our products are met GB or manufacturer standard.产品质量均符合GB标准及公司标准.The instrument conforms to the standards ISO, GB, AATCC.仪器性能符合GB 、 ISO 、 AATCC等 标准对测试的要求.What's the difference in Stainless steer classification ...
Water - borne polyurethane is the predominant material of membrane pressing adhesive.水性 聚氨酯是真空吸塑胶的主要成分.The water - borne polyurethane was based on polyester diol and toluene diisocyanate etc.以聚酯多元醇、甲苯二异氰酸酯为主要原料合成了 水性 聚氨酯...