The 4th kind fights rhythm of the heart wrong medicaments is calcic passageway retarder .
第四类抗心律失常药物系钙通道阻滞剂。
Analyzing in theory and actual situation of applying on - the - spot shows it is essential for installing small group of retarder at the end of target area , furthermore this paper expounds some standpoint of wagon parameter in selection in design layout retarder .
This article summarizes the commercial application of the z-18 catalyst molecular sieve retarder activator in the residuum fluid catalytic cracking unit ( rfcc ) of khartoum refinery co. ltd ( krc ) .