用“derrick”造句大全，derrick造句
What'sthesafeworkingloadofeachderrick?Studyofforecastingthebearingcapacityofdrillderrickbasedondynamicparameters;Thepyloncellunitswerehoistedtothedeckbythetransferderrick.Fourfixedringsneedtobeaddedo...
用“derrick boom”造句大全，derrick boom造句
1、Theopeninghatchcovermethodalsonottobesatisfiedthatusingthewarpingheadofcargogearnotthroughderrickboomopenthehatchcoverbecauseusingderrickboomisnotsafe.2、ThederrickboomreststoberenewedasChiefOffice...
用“stiffleg derrick”造句大全，stiffleg derrick造句
stifflegderrickstifflegderricktraveler...